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Finding the Fourth Proportional to 121,146.20, 181,892.10 and 91,770.20

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Solution

The fourth proportional to 121,146.20, 181,892.10 and 91,770.20 is: 137,786.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,146.20 : 181,892.10 = 91,770.20 : x
  2. Step 2: Convert to fraction form
    121,146.20/181,892.10 = 91,770.20/x
  3. Step 3: Cross multiply
    121,146.20x = 181,892.10 × 91,770.20
  4. Step 4: Simplify right side
    121,146.20x = 16,692,274,395.42
  5. Step 5: Solve for x
    x = 16,692,274,395.42/121,146.20
  6. Step 6: Final answer
    x = 137,786.20

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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.