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Finding the Fourth Proportional to 121,981.40, 182,712.90 and 101,245.40

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Solution

The fourth proportional to 121,981.40, 182,712.90 and 101,245.40 is: 151,652.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,981.40 : 182,712.90 = 101,245.40 : x
  2. Step 2: Convert to fraction form
    121,981.40/182,712.90 = 101,245.40/x
  3. Step 3: Cross multiply
    121,981.40x = 182,712.90 × 101,245.40
  4. Step 4: Simplify right side
    121,981.40x = 18,498,840,645.66
  5. Step 5: Solve for x
    x = 18,498,840,645.66/121,981.40
  6. Step 6: Final answer
    x = 151,652.96

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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.