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Finding the Fourth Proportional to 155,388.60, 232,910.10 and 85,318.20

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Solution

The fourth proportional to 155,388.60, 232,910.10 and 85,318.20 is: 127,882.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,388.60 : 232,910.10 = 85,318.20 : x
  2. Step 2: Convert to fraction form
    155,388.60/232,910.10 = 85,318.20/x
  3. Step 3: Cross multiply
    155,388.60x = 232,910.10 × 85,318.20
  4. Step 4: Simplify right side
    155,388.60x = 19,871,470,493.82
  5. Step 5: Solve for x
    x = 19,871,470,493.82/155,388.60
  6. Step 6: Final answer
    x = 127,882.42

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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.