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Finding the Fourth Proportional to 80,552.90, 120,820.07 and 21,393.20

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Solution

The fourth proportional to 80,552.90, 120,820.07 and 21,393.20 is: 32,087.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,552.90 : 120,820.07 = 21,393.20 : x
  2. Step 2: Convert to fraction form
    80,552.90/120,820.07 = 21,393.20/x
  3. Step 3: Cross multiply
    80,552.90x = 120,820.07 × 21,393.20
  4. Step 4: Simplify right side
    80,552.90x = 2,584,727,210.46
  5. Step 5: Solve for x
    x = 2,584,727,210.46/80,552.90
  6. Step 6: Final answer
    x = 32,087.33

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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.