Home / 128,442.24-177,257.16-71,843.76

Finding the Fourth Proportional to 128,442.24, 177,257.16 and 71,843.76

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Solution

The fourth proportional to 128,442.24, 177,257.16 and 71,843.76 is: 99,148.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,442.24 : 177,257.16 = 71,843.76 : x
  2. Step 2: Convert to fraction form
    128,442.24/177,257.16 = 71,843.76/x
  3. Step 3: Cross multiply
    128,442.24x = 177,257.16 × 71,843.76
  4. Step 4: Simplify right side
    128,442.24x = 12,734,820,861.32
  5. Step 5: Solve for x
    x = 12,734,820,861.32/128,442.24
  6. Step 6: Final answer
    x = 99,148.23

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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.