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Finding the Fourth Proportional to 87,169.76, 120,148.08 and 66,744.80

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Solution

The fourth proportional to 87,169.76, 120,148.08 and 66,744.80 is: 91,995.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,169.76 : 120,148.08 = 66,744.80 : x
  2. Step 2: Convert to fraction form
    87,169.76/120,148.08 = 66,744.80/x
  3. Step 3: Cross multiply
    87,169.76x = 120,148.08 × 66,744.80
  4. Step 4: Simplify right side
    87,169.76x = 8,019,259,569.98
  5. Step 5: Solve for x
    x = 8,019,259,569.98/87,169.76
  6. Step 6: Final answer
    x = 91,995.89

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1.5x scale

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.