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Finding the Fourth Proportional to 161,125.20, 241,687.80 and 91,141.20

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Solution

The fourth proportional to 161,125.20, 241,687.80 and 91,141.20 is: 136,711.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,125.20 : 241,687.80 = 91,141.20 : x
  2. Step 2: Convert to fraction form
    161,125.20/241,687.80 = 91,141.20/x
  3. Step 3: Cross multiply
    161,125.20x = 241,687.80 × 91,141.20
  4. Step 4: Simplify right side
    161,125.20x = 22,027,716,117.36
  5. Step 5: Solve for x
    x = 22,027,716,117.36/161,125.20
  6. Step 6: Final answer
    x = 136,711.80

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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.