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Finding the Fourth Proportional to 81,642.80, 122,464.20 and 34,900.40

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Solution

The fourth proportional to 81,642.80, 122,464.20 and 34,900.40 is: 52,350.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,642.80 : 122,464.20 = 34,900.40 : x
  2. Step 2: Convert to fraction form
    81,642.80/122,464.20 = 34,900.40/x
  3. Step 3: Cross multiply
    81,642.80x = 122,464.20 × 34,900.40
  4. Step 4: Simplify right side
    81,642.80x = 4,274,049,565.68
  5. Step 5: Solve for x
    x = 4,274,049,565.68/81,642.80
  6. Step 6: Final answer
    x = 52,350.60

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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.