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Finding the Fourth Proportional to 103,425.91, 142,729.69 and 57,489.86

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Solution

The fourth proportional to 103,425.91, 142,729.69 and 57,489.86 is: 79,337.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,425.91 : 142,729.69 = 57,489.86 : x
  2. Step 2: Convert to fraction form
    103,425.91/142,729.69 = 57,489.86/x
  3. Step 3: Cross multiply
    103,425.91x = 142,729.69 × 57,489.86
  4. Step 4: Simplify right side
    103,425.91x = 8,205,509,608.49
  5. Step 5: Solve for x
    x = 8,205,509,608.49/103,425.91
  6. Step 6: Final answer
    x = 79,337.08

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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.