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Finding the Fourth Proportional to 291,694.38, 437,615.39 and 81,332.31

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Solution

The fourth proportional to 291,694.38, 437,615.39 and 81,332.31 is: 122,019.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,694.38 : 437,615.39 = 81,332.31 : x
  2. Step 2: Convert to fraction form
    291,694.38/437,615.39 = 81,332.31/x
  3. Step 3: Cross multiply
    291,694.38x = 437,615.39 × 81,332.31
  4. Step 4: Simplify right side
    291,694.38x = 35,592,270,560.25
  5. Step 5: Solve for x
    x = 35,592,270,560.25/291,694.38
  6. Step 6: Final answer
    x = 122,019.05

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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.