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Finding the Fourth Proportional to 128,144.96, 176,831.52 and 71,545.28

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Solution

The fourth proportional to 128,144.96, 176,831.52 and 71,545.28 is: 98,727.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,144.96 : 176,831.52 = 71,545.28 : x
  2. Step 2: Convert to fraction form
    128,144.96/176,831.52 = 71,545.28/x
  3. Step 3: Cross multiply
    128,144.96x = 176,831.52 × 71,545.28
  4. Step 4: Simplify right side
    128,144.96x = 12,651,460,611.23
  5. Step 5: Solve for x
    x = 12,651,460,611.23/128,144.96
  6. Step 6: Final answer
    x = 98,727.73

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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.