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Finding the Fourth Proportional to 138,521.40, 207,792.90 and 59,638.20

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Solution

The fourth proportional to 138,521.40, 207,792.90 and 59,638.20 is: 89,461.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,521.40 : 207,792.90 = 59,638.20 : x
  2. Step 2: Convert to fraction form
    138,521.40/207,792.90 = 59,638.20/x
  3. Step 3: Cross multiply
    138,521.40x = 207,792.90 × 59,638.20
  4. Step 4: Simplify right side
    138,521.40x = 12,392,394,528.78
  5. Step 5: Solve for x
    x = 12,392,394,528.78/138,521.40
  6. Step 6: Final answer
    x = 89,461.95

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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.