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Finding the Fourth Proportional to 291,711.25, 437,640.68 and 81,349.21

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Solution

The fourth proportional to 291,711.25, 437,640.68 and 81,349.21 is: 122,044.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,711.25 : 437,640.68 = 81,349.21 : x
  2. Step 2: Convert to fraction form
    291,711.25/437,640.68 = 81,349.21/x
  3. Step 3: Cross multiply
    291,711.25x = 437,640.68 × 81,349.21
  4. Step 4: Simplify right side
    291,711.25x = 35,601,723,581.86
  5. Step 5: Solve for x
    x = 35,601,723,581.86/291,711.25
  6. Step 6: Final answer
    x = 122,044.40

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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.