Home / 128,924.14-177,912.54-71,560.12

Finding the Fourth Proportional to 128,924.14, 177,912.54 and 71,560.12

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Solution

The fourth proportional to 128,924.14, 177,912.54 and 71,560.12 is: 98,751.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,924.14 : 177,912.54 = 71,560.12 : x
  2. Step 2: Convert to fraction form
    128,924.14/177,912.54 = 71,560.12/x
  3. Step 3: Cross multiply
    128,924.14x = 177,912.54 × 71,560.12
  4. Step 4: Simplify right side
    128,924.14x = 12,731,442,711.90
  5. Step 5: Solve for x
    x = 12,731,442,711.90/128,924.14
  6. Step 6: Final answer
    x = 98,751.43

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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.