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Finding the Fourth Proportional to 78,371.68, 108,149.94 and 42,560.92

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Solution

The fourth proportional to 78,371.68, 108,149.94 and 42,560.92 is: 58,732.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,371.68 : 108,149.94 = 42,560.92 : x
  2. Step 2: Convert to fraction form
    78,371.68/108,149.94 = 42,560.92/x
  3. Step 3: Cross multiply
    78,371.68x = 108,149.94 × 42,560.92
  4. Step 4: Simplify right side
    78,371.68x = 4,602,960,944.34
  5. Step 5: Solve for x
    x = 4,602,960,944.34/78,371.68
  6. Step 6: Final answer
    x = 58,732.45

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1.5x scale

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.