Home / 87,120.64-120,294.20-66,945.72

Finding the Fourth Proportional to 87,120.64, 120,294.20 and 66,945.72

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Solution

The fourth proportional to 87,120.64, 120,294.20 and 66,945.72 is: 92,437.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,120.64 : 120,294.20 = 66,945.72 : x
  2. Step 2: Convert to fraction form
    87,120.64/120,294.20 = 66,945.72/x
  3. Step 3: Cross multiply
    87,120.64x = 120,294.20 × 66,945.72
  4. Step 4: Simplify right side
    87,120.64x = 8,053,181,830.82
  5. Step 5: Solve for x
    x = 8,053,181,830.82/87,120.64
  6. Step 6: Final answer
    x = 92,437.13

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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.