Home / 81,831.87-122,750.24-31,909.95

Finding the Fourth Proportional to 81,831.87, 122,750.24 and 31,909.95

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Solution

The fourth proportional to 81,831.87, 122,750.24 and 31,909.95 is: 47,865.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,831.87 : 122,750.24 = 31,909.95 : x
  2. Step 2: Convert to fraction form
    81,831.87/122,750.24 = 31,909.95/x
  3. Step 3: Cross multiply
    81,831.87x = 122,750.24 × 31,909.95
  4. Step 4: Simplify right side
    81,831.87x = 3,916,953,861.34
  5. Step 5: Solve for x
    x = 3,916,953,861.34/81,831.87
  6. Step 6: Final answer
    x = 47,865.87

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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.