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Finding the Fourth Proportional to 68,401.80, 102,602.70 and 38,877.30

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Solution

The fourth proportional to 68,401.80, 102,602.70 and 38,877.30 is: 58,315.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,401.80 : 102,602.70 = 38,877.30 : x
  2. Step 2: Convert to fraction form
    68,401.80/102,602.70 = 38,877.30/x
  3. Step 3: Cross multiply
    68,401.80x = 102,602.70 × 38,877.30
  4. Step 4: Simplify right side
    68,401.80x = 3,988,915,948.71
  5. Step 5: Solve for x
    x = 3,988,915,948.71/68,401.80
  6. Step 6: Final answer
    x = 58,315.95

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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.