Home / 138,225.96-190,770.12-77,808.33

Finding the Fourth Proportional to 138,225.96, 190,770.12 and 77,808.33

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Solution

The fourth proportional to 138,225.96, 190,770.12 and 77,808.33 is: 107,385.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,225.96 : 190,770.12 = 77,808.33 : x
  2. Step 2: Convert to fraction form
    138,225.96/190,770.12 = 77,808.33/x
  3. Step 3: Cross multiply
    138,225.96x = 190,770.12 × 77,808.33
  4. Step 4: Simplify right side
    138,225.96x = 14,843,504,451.10
  5. Step 5: Solve for x
    x = 14,843,504,451.10/138,225.96
  6. Step 6: Final answer
    x = 107,385.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.