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Finding the Fourth Proportional to 138,554.40, 207,892.80 and 67,437.60

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Solution

The fourth proportional to 138,554.40, 207,892.80 and 67,437.60 is: 101,186.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,554.40 : 207,892.80 = 67,437.60 : x
  2. Step 2: Convert to fraction form
    138,554.40/207,892.80 = 67,437.60/x
  3. Step 3: Cross multiply
    138,554.40x = 207,892.80 × 67,437.60
  4. Step 4: Simplify right side
    138,554.40x = 14,019,791,489.28
  5. Step 5: Solve for x
    x = 14,019,791,489.28/138,554.40
  6. Step 6: Final answer
    x = 101,186.19

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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.