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Finding the Fourth Proportional to 92,508.40, 138,721.56 and 42,576.40

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Solution

The fourth proportional to 92,508.40, 138,721.56 and 42,576.40 is: 63,845.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,508.40 : 138,721.56 = 42,576.40 : x
  2. Step 2: Convert to fraction form
    92,508.40/138,721.56 = 42,576.40/x
  3. Step 3: Cross multiply
    92,508.40x = 138,721.56 × 42,576.40
  4. Step 4: Simplify right side
    92,508.40x = 5,906,264,627.18
  5. Step 5: Solve for x
    x = 5,906,264,627.18/92,508.40
  6. Step 6: Final answer
    x = 63,845.71

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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.