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Finding the Fourth Proportional to 138,604, 207,918.96 and 45,084.64

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Solution

The fourth proportional to 138,604, 207,918.96 and 45,084.64 is: 67,631.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,604 : 207,918.96 = 45,084.64 : x
  2. Step 2: Convert to fraction form
    138,604/207,918.96 = 45,084.64/x
  3. Step 3: Cross multiply
    138,604x = 207,918.96 × 45,084.64
  4. Step 4: Simplify right side
    138,604x = 9,373,951,460.77
  5. Step 5: Solve for x
    x = 9,373,951,460.77/138,604
  6. Step 6: Final answer
    x = 67,631.18

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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.