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Finding the Fourth Proportional to 157,891.20, 236,491.20 and 137,155.20

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Solution

The fourth proportional to 157,891.20, 236,491.20 and 137,155.20 is: 205,432.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,891.20 : 236,491.20 = 137,155.20 : x
  2. Step 2: Convert to fraction form
    157,891.20/236,491.20 = 137,155.20/x
  3. Step 3: Cross multiply
    157,891.20x = 236,491.20 × 137,155.20
  4. Step 4: Simplify right side
    157,891.20x = 32,435,997,834.24
  5. Step 5: Solve for x
    x = 32,435,997,834.24/157,891.20
  6. Step 6: Final answer
    x = 205,432.59

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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.