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Finding the Fourth Proportional to 525,678.42, 788,517.54 and 126,319.19

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Solution

The fourth proportional to 525,678.42, 788,517.54 and 126,319.19 is: 189,478.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,678.42 : 788,517.54 = 126,319.19 : x
  2. Step 2: Convert to fraction form
    525,678.42/788,517.54 = 126,319.19/x
  3. Step 3: Cross multiply
    525,678.42x = 788,517.54 × 126,319.19
  4. Step 4: Simplify right side
    525,678.42x = 99,604,895,298.10
  5. Step 5: Solve for x
    x = 99,604,895,298.10/525,678.42
  6. Step 6: Final answer
    x = 189,478.76

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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.