Home / 128,531.56-177,373.52-71,942.92

Finding the Fourth Proportional to 128,531.56, 177,373.52 and 71,942.92

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Solution

The fourth proportional to 128,531.56, 177,373.52 and 71,942.92 is: 99,281.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,531.56 : 177,373.52 = 71,942.92 : x
  2. Step 2: Convert to fraction form
    128,531.56/177,373.52 = 71,942.92/x
  3. Step 3: Cross multiply
    128,531.56x = 177,373.52 × 71,942.92
  4. Step 4: Simplify right side
    128,531.56x = 12,760,768,959.48
  5. Step 5: Solve for x
    x = 12,760,768,959.48/128,531.56
  6. Step 6: Final answer
    x = 99,281.21

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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.