Home / 128,278.04-177,023.97-71,689.42

Finding the Fourth Proportional to 128,278.04, 177,023.97 and 71,689.42

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Solution

The fourth proportional to 128,278.04, 177,023.97 and 71,689.42 is: 98,931.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,278.04 : 177,023.97 = 71,689.42 : x
  2. Step 2: Convert to fraction form
    128,278.04/177,023.97 = 71,689.42/x
  3. Step 3: Cross multiply
    128,278.04x = 177,023.97 × 71,689.42
  4. Step 4: Simplify right side
    128,278.04x = 12,690,745,292.84
  5. Step 5: Solve for x
    x = 12,690,745,292.84/128,278.04
  6. Step 6: Final answer
    x = 98,931.55

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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.