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Finding the Fourth Proportional to 60,831.96, 91,248.17 and 18,711.77

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Solution

The fourth proportional to 60,831.96, 91,248.17 and 18,711.77 is: 28,067.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,831.96 : 91,248.17 = 18,711.77 : x
  2. Step 2: Convert to fraction form
    60,831.96/91,248.17 = 18,711.77/x
  3. Step 3: Cross multiply
    60,831.96x = 91,248.17 × 18,711.77
  4. Step 4: Simplify right side
    60,831.96x = 1,707,414,220.16
  5. Step 5: Solve for x
    x = 1,707,414,220.16/60,831.96
  6. Step 6: Final answer
    x = 28,067.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.