Home / 128,810.97-177,744.15-71,436.38

Finding the Fourth Proportional to 128,810.97, 177,744.15 and 71,436.38

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Solution

The fourth proportional to 128,810.97, 177,744.15 and 71,436.38 is: 98,573.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,810.97 : 177,744.15 = 71,436.38 : x
  2. Step 2: Convert to fraction form
    128,810.97/177,744.15 = 71,436.38/x
  3. Step 3: Cross multiply
    128,810.97x = 177,744.15 × 71,436.38
  4. Step 4: Simplify right side
    128,810.97x = 12,697,397,753.46
  5. Step 5: Solve for x
    x = 12,697,397,753.46/128,810.97
  6. Step 6: Final answer
    x = 98,573.89

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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.