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Finding the Fourth Proportional to 138,801.90, 208,251.45 and 59,972.70

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Solution

The fourth proportional to 138,801.90, 208,251.45 and 59,972.70 is: 89,980.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,801.90 : 208,251.45 = 59,972.70 : x
  2. Step 2: Convert to fraction form
    138,801.90/208,251.45 = 59,972.70/x
  3. Step 3: Cross multiply
    138,801.90x = 208,251.45 × 59,972.70
  4. Step 4: Simplify right side
    138,801.90x = 12,489,401,735.42
  5. Step 5: Solve for x
    x = 12,489,401,735.42/138,801.90
  6. Step 6: Final answer
    x = 89,980.05

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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.