Home / 128,780.08-177,680.28-101,471.47

Finding the Fourth Proportional to 128,780.08, 177,680.28 and 101,471.47

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Solution

The fourth proportional to 128,780.08, 177,680.28 and 101,471.47 is: 140,002.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,780.08 : 177,680.28 = 101,471.47 : x
  2. Step 2: Convert to fraction form
    128,780.08/177,680.28 = 101,471.47/x
  3. Step 3: Cross multiply
    128,780.08x = 177,680.28 × 101,471.47
  4. Step 4: Simplify right side
    128,780.08x = 18,029,479,201.61
  5. Step 5: Solve for x
    x = 18,029,479,201.61/128,780.08
  6. Step 6: Final answer
    x = 140,002.08

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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.