Home / 128,508.26-177,335.34-71,143.52

Finding the Fourth Proportional to 128,508.26, 177,335.34 and 71,143.52

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Solution

The fourth proportional to 128,508.26, 177,335.34 and 71,143.52 is: 98,174.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,508.26 : 177,335.34 = 71,143.52 : x
  2. Step 2: Convert to fraction form
    128,508.26/177,335.34 = 71,143.52/x
  3. Step 3: Cross multiply
    128,508.26x = 177,335.34 × 71,143.52
  4. Step 4: Simplify right side
    128,508.26x = 12,616,260,308.00
  5. Step 5: Solve for x
    x = 12,616,260,308.00/128,508.26
  6. Step 6: Final answer
    x = 98,174.70

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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.