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Finding the Fourth Proportional to 87,290.50, 120,461.70 and 49,565.56

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Solution

The fourth proportional to 87,290.50, 120,461.70 and 49,565.56 is: 68,400.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,290.50 : 120,461.70 = 49,565.56 : x
  2. Step 2: Convert to fraction form
    87,290.50/120,461.70 = 49,565.56/x
  3. Step 3: Cross multiply
    87,290.50x = 120,461.70 × 49,565.56
  4. Step 4: Simplify right side
    87,290.50x = 5,970,751,619.05
  5. Step 5: Solve for x
    x = 5,970,751,619.05/87,290.50
  6. Step 6: Final answer
    x = 68,400.93

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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.