Home / 128,766.39-177,698.01-71,409.79

Finding the Fourth Proportional to 128,766.39, 177,698.01 and 71,409.79

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Solution

The fourth proportional to 128,766.39, 177,698.01 and 71,409.79 is: 98,545.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,766.39 : 177,698.01 = 71,409.79 : x
  2. Step 2: Convert to fraction form
    128,766.39/177,698.01 = 71,409.79/x
  3. Step 3: Cross multiply
    128,766.39x = 177,698.01 × 71,409.79
  4. Step 4: Simplify right side
    128,766.39x = 12,689,377,577.52
  5. Step 5: Solve for x
    x = 12,689,377,577.52/128,766.39
  6. Step 6: Final answer
    x = 98,545.73

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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.