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Finding the Fourth Proportional to 138,434.95, 207,700.61 and 43,679.76

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Solution

The fourth proportional to 138,434.95, 207,700.61 and 43,679.76 is: 65,534.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,434.95 : 207,700.61 = 43,679.76 : x
  2. Step 2: Convert to fraction form
    138,434.95/207,700.61 = 43,679.76/x
  3. Step 3: Cross multiply
    138,434.95x = 207,700.61 × 43,679.76
  4. Step 4: Simplify right side
    138,434.95x = 9,072,312,796.65
  5. Step 5: Solve for x
    x = 9,072,312,796.65/138,434.95
  6. Step 6: Final answer
    x = 65,534.84

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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.