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Finding the Fourth Proportional to 68,472.20, 102,612.30 and 54,456.20

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Solution

The fourth proportional to 68,472.20, 102,612.30 and 54,456.20 is: 81,607.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,472.20 : 102,612.30 = 54,456.20 : x
  2. Step 2: Convert to fraction form
    68,472.20/102,612.30 = 54,456.20/x
  3. Step 3: Cross multiply
    68,472.20x = 102,612.30 × 54,456.20
  4. Step 4: Simplify right side
    68,472.20x = 5,587,875,931.26
  5. Step 5: Solve for x
    x = 5,587,875,931.26/68,472.20
  6. Step 6: Final answer
    x = 81,607.95

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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.