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Finding the Fourth Proportional to 87,181.52, 120,290.87 and 51,374.86

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Solution

The fourth proportional to 87,181.52, 120,290.87 and 51,374.86 is: 70,885.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,181.52 : 120,290.87 = 51,374.86 : x
  2. Step 2: Convert to fraction form
    87,181.52/120,290.87 = 51,374.86/x
  3. Step 3: Cross multiply
    87,181.52x = 120,290.87 × 51,374.86
  4. Step 4: Simplify right side
    87,181.52x = 6,179,926,433.24
  5. Step 5: Solve for x
    x = 6,179,926,433.24/87,181.52
  6. Step 6: Final answer
    x = 70,885.74

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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.