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Finding the Fourth Proportional to 155,016.59, 213,921.02 and 87,031.88

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Solution

The fourth proportional to 155,016.59, 213,921.02 and 87,031.88 is: 120,102.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,016.59 : 213,921.02 = 87,031.88 : x
  2. Step 2: Convert to fraction form
    155,016.59/213,921.02 = 87,031.88/x
  3. Step 3: Cross multiply
    155,016.59x = 213,921.02 × 87,031.88
  4. Step 4: Simplify right side
    155,016.59x = 18,617,948,542.12
  5. Step 5: Solve for x
    x = 18,617,948,542.12/155,016.59
  6. Step 6: Final answer
    x = 120,102.94

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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.