Home / 87,008.28-120,129.21-66,829.02

Finding the Fourth Proportional to 87,008.28, 120,129.21 and 66,829.02

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Solution

The fourth proportional to 87,008.28, 120,129.21 and 66,829.02 is: 92,268.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,008.28 : 120,129.21 = 66,829.02 : x
  2. Step 2: Convert to fraction form
    87,008.28/120,129.21 = 66,829.02/x
  3. Step 3: Cross multiply
    87,008.28x = 120,129.21 × 66,829.02
  4. Step 4: Simplify right side
    87,008.28x = 8,028,117,377.67
  5. Step 5: Solve for x
    x = 8,028,117,377.67/87,008.28
  6. Step 6: Final answer
    x = 92,268.43

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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.