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Finding the Fourth Proportional to 136,812.97, 205,251.06 and 43,318.72

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Solution

The fourth proportional to 136,812.97, 205,251.06 and 43,318.72 is: 64,988.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,812.97 : 205,251.06 = 43,318.72 : x
  2. Step 2: Convert to fraction form
    136,812.97/205,251.06 = 43,318.72/x
  3. Step 3: Cross multiply
    136,812.97x = 205,251.06 × 43,318.72
  4. Step 4: Simplify right side
    136,812.97x = 8,891,212,171.59
  5. Step 5: Solve for x
    x = 8,891,212,171.59/136,812.97
  6. Step 6: Final answer
    x = 64,988.08

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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.