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Finding the Fourth Proportional to 78,424.40, 108,226.13 and 42,614.71

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Solution

The fourth proportional to 78,424.40, 108,226.13 and 42,614.71 is: 58,808.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,424.40 : 108,226.13 = 42,614.71 : x
  2. Step 2: Convert to fraction form
    78,424.40/108,226.13 = 42,614.71/x
  3. Step 3: Cross multiply
    78,424.40x = 108,226.13 × 42,614.71
  4. Step 4: Simplify right side
    78,424.40x = 4,612,024,660.73
  5. Step 5: Solve for x
    x = 4,612,024,660.73/78,424.40
  6. Step 6: Final answer
    x = 58,808.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.