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Finding the Fourth Proportional to 68,520.57, 102,710.84 and 38,875.78

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Solution

The fourth proportional to 68,520.57, 102,710.84 and 38,875.78 is: 58,273.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,520.57 : 102,710.84 = 38,875.78 : x
  2. Step 2: Convert to fraction form
    68,520.57/102,710.84 = 38,875.78/x
  3. Step 3: Cross multiply
    68,520.57x = 102,710.84 × 38,875.78
  4. Step 4: Simplify right side
    68,520.57x = 3,992,963,953.46
  5. Step 5: Solve for x
    x = 3,992,963,953.46/68,520.57
  6. Step 6: Final answer
    x = 58,273.95

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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.