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Finding the Fourth Proportional to 149,191.20, 205,876.80 and 82,123.20

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Solution

The fourth proportional to 149,191.20, 205,876.80 and 82,123.20 is: 113,326.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,191.20 : 205,876.80 = 82,123.20 : x
  2. Step 2: Convert to fraction form
    149,191.20/205,876.80 = 82,123.20/x
  3. Step 3: Cross multiply
    149,191.20x = 205,876.80 × 82,123.20
  4. Step 4: Simplify right side
    149,191.20x = 16,907,261,621.76
  5. Step 5: Solve for x
    x = 16,907,261,621.76/149,191.20
  6. Step 6: Final answer
    x = 113,326.13

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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.