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Finding the Fourth Proportional to 161,716.70, 242,575.05 and 138,388.70

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Solution

The fourth proportional to 161,716.70, 242,575.05 and 138,388.70 is: 207,583.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,716.70 : 242,575.05 = 138,388.70 : x
  2. Step 2: Convert to fraction form
    161,716.70/242,575.05 = 138,388.70/x
  3. Step 3: Cross multiply
    161,716.70x = 242,575.05 × 138,388.70
  4. Step 4: Simplify right side
    161,716.70x = 33,569,645,821.94
  5. Step 5: Solve for x
    x = 33,569,645,821.94/161,716.70
  6. Step 6: Final answer
    x = 207,583.05

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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.