Home / 74,023.20-102,146.40-40,489.20

Finding the Fourth Proportional to 74,023.20, 102,146.40 and 40,489.20

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Solution

The fourth proportional to 74,023.20, 102,146.40 and 40,489.20 is: 55,872.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,023.20 : 102,146.40 = 40,489.20 : x
  2. Step 2: Convert to fraction form
    74,023.20/102,146.40 = 40,489.20/x
  3. Step 3: Cross multiply
    74,023.20x = 102,146.40 × 40,489.20
  4. Step 4: Simplify right side
    74,023.20x = 4,135,826,018.88
  5. Step 5: Solve for x
    x = 4,135,826,018.88/74,023.20
  6. Step 6: Final answer
    x = 55,872.02

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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.