Home / 128,278.55-177,024.66-71,689.92

Finding the Fourth Proportional to 128,278.55, 177,024.66 and 71,689.92

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Solution

The fourth proportional to 128,278.55, 177,024.66 and 71,689.92 is: 98,932.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,278.55 : 177,024.66 = 71,689.92 : x
  2. Step 2: Convert to fraction form
    128,278.55/177,024.66 = 71,689.92/x
  3. Step 3: Cross multiply
    128,278.55x = 177,024.66 × 71,689.92
  4. Step 4: Simplify right side
    128,278.55x = 12,690,883,713.43
  5. Step 5: Solve for x
    x = 12,690,883,713.43/128,278.55
  6. Step 6: Final answer
    x = 98,932.24

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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.