Home / 128,514.30-177,349.71-71,925.68

Finding the Fourth Proportional to 128,514.30, 177,349.71 and 71,925.68

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Solution

The fourth proportional to 128,514.30, 177,349.71 and 71,925.68 is: 99,257.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,514.30 : 177,349.71 = 71,925.68 : x
  2. Step 2: Convert to fraction form
    128,514.30/177,349.71 = 71,925.68/x
  3. Step 3: Cross multiply
    128,514.30x = 177,349.71 × 71,925.68
  4. Step 4: Simplify right side
    128,514.30x = 12,755,998,489.55
  5. Step 5: Solve for x
    x = 12,755,998,489.55/128,514.30
  6. Step 6: Final answer
    x = 99,257.42

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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.