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Finding the Fourth Proportional to 68,711.58, 102,859.89 and 62,140.86

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Solution

The fourth proportional to 68,711.58, 102,859.89 and 62,140.86 is: 93,023.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,711.58 : 102,859.89 = 62,140.86 : x
  2. Step 2: Convert to fraction form
    68,711.58/102,859.89 = 62,140.86/x
  3. Step 3: Cross multiply
    68,711.58x = 102,859.89 × 62,140.86
  4. Step 4: Simplify right side
    68,711.58x = 6,391,802,024.11
  5. Step 5: Solve for x
    x = 6,391,802,024.11/68,711.58
  6. Step 6: Final answer
    x = 93,023.65

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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.