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Finding the Fourth Proportional to 60,240.92, 90,371.70 and 20,788.79

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Solution

The fourth proportional to 60,240.92, 90,371.70 and 20,788.79 is: 31,186.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,240.92 : 90,371.70 = 20,788.79 : x
  2. Step 2: Convert to fraction form
    60,240.92/90,371.70 = 20,788.79/x
  3. Step 3: Cross multiply
    60,240.92x = 90,371.70 × 20,788.79
  4. Step 4: Simplify right side
    60,240.92x = 1,878,717,841.38
  5. Step 5: Solve for x
    x = 1,878,717,841.38/60,240.92
  6. Step 6: Final answer
    x = 31,186.74

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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.