Home / 128,439.82-177,240.66-71,078.14

Finding the Fourth Proportional to 128,439.82, 177,240.66 and 71,078.14

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Solution

The fourth proportional to 128,439.82, 177,240.66 and 71,078.14 is: 98,084.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,439.82 : 177,240.66 = 71,078.14 : x
  2. Step 2: Convert to fraction form
    128,439.82/177,240.66 = 71,078.14/x
  3. Step 3: Cross multiply
    128,439.82x = 177,240.66 × 71,078.14
  4. Step 4: Simplify right side
    128,439.82x = 12,597,936,445.17
  5. Step 5: Solve for x
    x = 12,597,936,445.17/128,439.82
  6. Step 6: Final answer
    x = 98,084.35

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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.