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Finding the Fourth Proportional to 77,480.55, 106,920 and 43,489.71

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Solution

The fourth proportional to 77,480.55, 106,920 and 43,489.71 is: 60,014.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,480.55 : 106,920 = 43,489.71 : x
  2. Step 2: Convert to fraction form
    77,480.55/106,920 = 43,489.71/x
  3. Step 3: Cross multiply
    77,480.55x = 106,920 × 43,489.71
  4. Step 4: Simplify right side
    77,480.55x = 4,649,919,793.20
  5. Step 5: Solve for x
    x = 4,649,919,793.20/77,480.55
  6. Step 6: Final answer
    x = 60,014.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.