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Finding the Fourth Proportional to 291,906.18, 437,851.17 and 81,538.38

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Solution

The fourth proportional to 291,906.18, 437,851.17 and 81,538.38 is: 122,305.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,906.18 : 437,851.17 = 81,538.38 : x
  2. Step 2: Convert to fraction form
    291,906.18/437,851.17 = 81,538.38/x
  3. Step 3: Cross multiply
    291,906.18x = 437,851.17 × 81,538.38
  4. Step 4: Simplify right side
    291,906.18x = 35,701,675,082.90
  5. Step 5: Solve for x
    x = 35,701,675,082.90/291,906.18
  6. Step 6: Final answer
    x = 122,305.31

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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.