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Finding the Fourth Proportional to 161,719.30, 242,578.95 and 138,099.70

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Solution

The fourth proportional to 161,719.30, 242,578.95 and 138,099.70 is: 207,149.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,719.30 : 242,578.95 = 138,099.70 : x
  2. Step 2: Convert to fraction form
    161,719.30/242,578.95 = 138,099.70/x
  3. Step 3: Cross multiply
    161,719.30x = 242,578.95 × 138,099.70
  4. Step 4: Simplify right side
    161,719.30x = 33,500,080,221.32
  5. Step 5: Solve for x
    x = 33,500,080,221.32/161,719.30
  6. Step 6: Final answer
    x = 207,149.55

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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.