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Finding the Fourth Proportional to 68,685.30, 102,951.15 and 39,117.30

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Solution

The fourth proportional to 68,685.30, 102,951.15 and 39,117.30 is: 58,632.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,685.30 : 102,951.15 = 39,117.30 : x
  2. Step 2: Convert to fraction form
    68,685.30/102,951.15 = 39,117.30/x
  3. Step 3: Cross multiply
    68,685.30x = 102,951.15 × 39,117.30
  4. Step 4: Simplify right side
    68,685.30x = 4,027,171,019.90
  5. Step 5: Solve for x
    x = 4,027,171,019.90/68,685.30
  6. Step 6: Final answer
    x = 58,632.21

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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.