Home / 128,545.42-177,390.46-71,183.61

Finding the Fourth Proportional to 128,545.42, 177,390.46 and 71,183.61

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Solution

The fourth proportional to 128,545.42, 177,390.46 and 71,183.61 is: 98,232.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,545.42 : 177,390.46 = 71,183.61 : x
  2. Step 2: Convert to fraction form
    128,545.42/177,390.46 = 71,183.61/x
  3. Step 3: Cross multiply
    128,545.42x = 177,390.46 × 71,183.61
  4. Step 4: Simplify right side
    128,545.42x = 12,627,292,079.49
  5. Step 5: Solve for x
    x = 12,627,292,079.49/128,545.42
  6. Step 6: Final answer
    x = 98,232.14

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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.