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Finding the Fourth Proportional to 92,706.21, 138,948.08 and 42,717.69

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Solution

The fourth proportional to 92,706.21, 138,948.08 and 42,717.69 is: 64,025.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,706.21 : 138,948.08 = 42,717.69 : x
  2. Step 2: Convert to fraction form
    92,706.21/138,948.08 = 42,717.69/x
  3. Step 3: Cross multiply
    92,706.21x = 138,948.08 × 42,717.69
  4. Step 4: Simplify right side
    92,706.21x = 5,935,540,793.95
  5. Step 5: Solve for x
    x = 5,935,540,793.95/92,706.21
  6. Step 6: Final answer
    x = 64,025.28

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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.