Home / 155,955.90-215,218.92-87,972.66

Finding the Fourth Proportional to 155,955.90, 215,218.92 and 87,972.66

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Solution

The fourth proportional to 155,955.90, 215,218.92 and 87,972.66 is: 121,402.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,955.90 : 215,218.92 = 87,972.66 : x
  2. Step 2: Convert to fraction form
    155,955.90/215,218.92 = 87,972.66/x
  3. Step 3: Cross multiply
    155,955.90x = 215,218.92 × 87,972.66
  4. Step 4: Simplify right side
    155,955.90x = 18,933,380,874.73
  5. Step 5: Solve for x
    x = 18,933,380,874.73/155,955.90
  6. Step 6: Final answer
    x = 121,402.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.