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Finding the Fourth Proportional to 161,387.64, 242,148.69 and 86,488.56

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Solution

The fourth proportional to 161,387.64, 242,148.69 and 86,488.56 is: 129,768.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,387.64 : 242,148.69 = 86,488.56 : x
  2. Step 2: Convert to fraction form
    161,387.64/242,148.69 = 86,488.56/x
  3. Step 3: Cross multiply
    161,387.64x = 242,148.69 × 86,488.56
  4. Step 4: Simplify right side
    161,387.64x = 20,943,091,503.99
  5. Step 5: Solve for x
    x = 20,943,091,503.99/161,387.64
  6. Step 6: Final answer
    x = 129,768.87

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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.