Home / 128,521.52-177,357.96-71,932.88

Finding the Fourth Proportional to 128,521.52, 177,357.96 and 71,932.88

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Solution

The fourth proportional to 128,521.52, 177,357.96 and 71,932.88 is: 99,266.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,521.52 : 177,357.96 = 71,932.88 : x
  2. Step 2: Convert to fraction form
    128,521.52/177,357.96 = 71,932.88/x
  3. Step 3: Cross multiply
    128,521.52x = 177,357.96 × 71,932.88
  4. Step 4: Simplify right side
    128,521.52x = 12,757,868,853.72
  5. Step 5: Solve for x
    x = 12,757,868,853.72/128,521.52
  6. Step 6: Final answer
    x = 99,266.40

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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.