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Finding the Fourth Proportional to 68,337.20, 102,505.80 and 65,712.80

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Solution

The fourth proportional to 68,337.20, 102,505.80 and 65,712.80 is: 98,569.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,337.20 : 102,505.80 = 65,712.80 : x
  2. Step 2: Convert to fraction form
    68,337.20/102,505.80 = 65,712.80/x
  3. Step 3: Cross multiply
    68,337.20x = 102,505.80 × 65,712.80
  4. Step 4: Simplify right side
    68,337.20x = 6,735,943,134.24
  5. Step 5: Solve for x
    x = 6,735,943,134.24/68,337.20
  6. Step 6: Final answer
    x = 98,569.20

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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.