Home / 128,535.52-177,377.28-71,946.88

Finding the Fourth Proportional to 128,535.52, 177,377.28 and 71,946.88

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Solution

The fourth proportional to 128,535.52, 177,377.28 and 71,946.88 is: 99,285.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,535.52 : 177,377.28 = 71,946.88 : x
  2. Step 2: Convert to fraction form
    128,535.52/177,377.28 = 71,946.88/x
  3. Step 3: Cross multiply
    128,535.52x = 177,377.28 × 71,946.88
  4. Step 4: Simplify right side
    128,535.52x = 12,761,741,878.89
  5. Step 5: Solve for x
    x = 12,761,741,878.89/128,535.52
  6. Step 6: Final answer
    x = 99,285.72

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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.