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Finding the Fourth Proportional to 138,613.84, 207,946.38 and 43,867.90

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Solution

The fourth proportional to 138,613.84, 207,946.38 and 43,867.90 is: 65,809.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,613.84 : 207,946.38 = 43,867.90 : x
  2. Step 2: Convert to fraction form
    138,613.84/207,946.38 = 43,867.90/x
  3. Step 3: Cross multiply
    138,613.84x = 207,946.38 × 43,867.90
  4. Step 4: Simplify right side
    138,613.84x = 9,122,171,003.20
  5. Step 5: Solve for x
    x = 9,122,171,003.20/138,613.84
  6. Step 6: Final answer
    x = 65,809.96

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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.