Home / 428,678,129,071.96-643,034,939,208.54-126,490,726,047.16

Finding the Fourth Proportional to 428,678,129,071.96, 643,034,939,208.54 and 126,490,726,047.16

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Solution

The fourth proportional to 428,678,129,071.96, 643,034,939,208.54 and 126,490,726,047.16 is: 189,741,325,292.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,678,129,071.96 : 643,034,939,208.54 = 126,490,726,047.16 : x
  2. Step 2: Convert to fraction form
    428,678,129,071.96/643,034,939,208.54 = 126,490,726,047.16/x
  3. Step 3: Cross multiply
    428,678,129,071.96x = 643,034,939,208.54 × 126,490,726,047.16
  4. Step 4: Simplify right side
    428,678,129,071.96x = 81,337,956,334,179,618,652,160
  5. Step 5: Solve for x
    x = 81,337,956,334,179,618,652,160/428,678,129,071.96
  6. Step 6: Final answer
    x = 189,741,325,292.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.