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Finding the Fourth Proportional to 60,831.30, 91,217.79 and 31,233.90

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Solution

The fourth proportional to 60,831.30, 91,217.79 and 31,233.90 is: 46,835.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,831.30 : 91,217.79 = 31,233.90 : x
  2. Step 2: Convert to fraction form
    60,831.30/91,217.79 = 31,233.90/x
  3. Step 3: Cross multiply
    60,831.30x = 91,217.79 × 31,233.90
  4. Step 4: Simplify right side
    60,831.30x = 2,849,087,331.08
  5. Step 5: Solve for x
    x = 2,849,087,331.08/60,831.30
  6. Step 6: Final answer
    x = 46,835.88

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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.