Home / 87,728.59-121,066.14-48,438.78

Finding the Fourth Proportional to 87,728.59, 121,066.14 and 48,438.78

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Solution

The fourth proportional to 87,728.59, 121,066.14 and 48,438.78 is: 66,845.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,728.59 : 121,066.14 = 48,438.78 : x
  2. Step 2: Convert to fraction form
    87,728.59/121,066.14 = 48,438.78/x
  3. Step 3: Cross multiply
    87,728.59x = 121,066.14 × 48,438.78
  4. Step 4: Simplify right side
    87,728.59x = 5,864,296,120.91
  5. Step 5: Solve for x
    x = 5,864,296,120.91/87,728.59
  6. Step 6: Final answer
    x = 66,845.90

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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.