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Finding the Fourth Proportional to 261,221.46, 391,831.92 and 71,683.92

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Solution

The fourth proportional to 261,221.46, 391,831.92 and 71,683.92 is: 107,525.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,221.46 : 391,831.92 = 71,683.92 : x
  2. Step 2: Convert to fraction form
    261,221.46/391,831.92 = 71,683.92/x
  3. Step 3: Cross multiply
    261,221.46x = 391,831.92 × 71,683.92
  4. Step 4: Simplify right side
    261,221.46x = 28,088,048,006.73
  5. Step 5: Solve for x
    x = 28,088,048,006.73/261,221.46
  6. Step 6: Final answer
    x = 107,525.81

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1.5x scale

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.