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Finding the Fourth Proportional to 137,921.20, 206,881.80 and 44,436.40

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Solution

The fourth proportional to 137,921.20, 206,881.80 and 44,436.40 is: 66,654.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,921.20 : 206,881.80 = 44,436.40 : x
  2. Step 2: Convert to fraction form
    137,921.20/206,881.80 = 44,436.40/x
  3. Step 3: Cross multiply
    137,921.20x = 206,881.80 × 44,436.40
  4. Step 4: Simplify right side
    137,921.20x = 9,193,082,417.52
  5. Step 5: Solve for x
    x = 9,193,082,417.52/137,921.20
  6. Step 6: Final answer
    x = 66,654.60

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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.