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Finding the Fourth Proportional to 87,045.50, 119,340.49 and 85,470.86

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Solution

The fourth proportional to 87,045.50, 119,340.49 and 85,470.86 is: 117,181.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,045.50 : 119,340.49 = 85,470.86 : x
  2. Step 2: Convert to fraction form
    87,045.50/119,340.49 = 85,470.86/x
  3. Step 3: Cross multiply
    87,045.50x = 119,340.49 × 85,470.86
  4. Step 4: Simplify right side
    87,045.50x = 10,200,134,313.12
  5. Step 5: Solve for x
    x = 10,200,134,313.12/87,045.50
  6. Step 6: Final answer
    x = 117,181.64

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.