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Finding the Fourth Proportional to 181,677.72, 272,122.70 and 87,987

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Solution

The fourth proportional to 181,677.72, 272,122.70 and 87,987 is: 131,789.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    181,677.72 : 272,122.70 = 87,987 : x
  2. Step 2: Convert to fraction form
    181,677.72/272,122.70 = 87,987/x
  3. Step 3: Cross multiply
    181,677.72x = 272,122.70 × 87,987
  4. Step 4: Simplify right side
    181,677.72x = 23,943,260,004.90
  5. Step 5: Solve for x
    x = 23,943,260,004.90/181,677.72
  6. Step 6: Final answer
    x = 131,789.74

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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.