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Finding the Fourth Proportional to 81,335.40, 122,023.10 and 28,028.20

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Solution

The fourth proportional to 81,335.40, 122,023.10 and 28,028.20 is: 42,049.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,335.40 : 122,023.10 = 28,028.20 : x
  2. Step 2: Convert to fraction form
    81,335.40/122,023.10 = 28,028.20/x
  3. Step 3: Cross multiply
    81,335.40x = 122,023.10 × 28,028.20
  4. Step 4: Simplify right side
    81,335.40x = 3,420,087,851.42
  5. Step 5: Solve for x
    x = 3,420,087,851.42/81,335.40
  6. Step 6: Final answer
    x = 42,049.19

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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.