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Finding the Fourth Proportional to 67,220.80, 100,831.20 and 56,723.20

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Solution

The fourth proportional to 67,220.80, 100,831.20 and 56,723.20 is: 85,084.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,220.80 : 100,831.20 = 56,723.20 : x
  2. Step 2: Convert to fraction form
    67,220.80/100,831.20 = 56,723.20/x
  3. Step 3: Cross multiply
    67,220.80x = 100,831.20 × 56,723.20
  4. Step 4: Simplify right side
    67,220.80x = 5,719,468,323.84
  5. Step 5: Solve for x
    x = 5,719,468,323.84/67,220.80
  6. Step 6: Final answer
    x = 85,084.80

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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.