Home / 128,575.92-177,424.56-71,979.60

Finding the Fourth Proportional to 128,575.92, 177,424.56 and 71,979.60

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Solution

The fourth proportional to 128,575.92, 177,424.56 and 71,979.60 is: 99,326.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,575.92 : 177,424.56 = 71,979.60 : x
  2. Step 2: Convert to fraction form
    128,575.92/177,424.56 = 71,979.60/x
  3. Step 3: Cross multiply
    128,575.92x = 177,424.56 × 71,979.60
  4. Step 4: Simplify right side
    128,575.92x = 12,770,948,858.98
  5. Step 5: Solve for x
    x = 12,770,948,858.98/128,575.92
  6. Step 6: Final answer
    x = 99,326.13

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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.