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Finding the Fourth Proportional to 92,508.57, 138,818.21 and 39,918.05

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Solution

The fourth proportional to 92,508.57, 138,818.21 and 39,918.05 is: 59,900.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,508.57 : 138,818.21 = 39,918.05 : x
  2. Step 2: Convert to fraction form
    92,508.57/138,818.21 = 39,918.05/x
  3. Step 3: Cross multiply
    92,508.57x = 138,818.21 × 39,918.05
  4. Step 4: Simplify right side
    92,508.57x = 5,541,352,655.43
  5. Step 5: Solve for x
    x = 5,541,352,655.43/92,508.57
  6. Step 6: Final answer
    x = 59,900.97

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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.