Home / 87,617.87-120,912.77-47,331.64

Finding the Fourth Proportional to 87,617.87, 120,912.77 and 47,331.64

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Solution

The fourth proportional to 87,617.87, 120,912.77 and 47,331.64 is: 65,317.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,617.87 : 120,912.77 = 47,331.64 : x
  2. Step 2: Convert to fraction form
    87,617.87/120,912.77 = 47,331.64/x
  3. Step 3: Cross multiply
    87,617.87x = 120,912.77 × 47,331.64
  4. Step 4: Simplify right side
    87,617.87x = 5,722,999,701.04
  5. Step 5: Solve for x
    x = 5,722,999,701.04/87,617.87
  6. Step 6: Final answer
    x = 65,317.72

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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.