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Finding the Fourth Proportional to 60,831.93, 91,240.71 and 18,711.93

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Solution

The fourth proportional to 60,831.93, 91,240.71 and 18,711.93 is: 28,065.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,831.93 : 91,240.71 = 18,711.93 : x
  2. Step 2: Convert to fraction form
    60,831.93/91,240.71 = 18,711.93/x
  3. Step 3: Cross multiply
    60,831.93x = 91,240.71 × 18,711.93
  4. Step 4: Simplify right side
    60,831.93x = 1,707,289,778.67
  5. Step 5: Solve for x
    x = 1,707,289,778.67/60,831.93
  6. Step 6: Final answer
    x = 28,065.68

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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.