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Finding the Fourth Proportional to 137,780.40, 206,728.20 and 44,314.80

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Solution

The fourth proportional to 137,780.40, 206,728.20 and 44,314.80 is: 66,490.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,780.40 : 206,728.20 = 44,314.80 : x
  2. Step 2: Convert to fraction form
    137,780.40/206,728.20 = 44,314.80/x
  3. Step 3: Cross multiply
    137,780.40x = 206,728.20 × 44,314.80
  4. Step 4: Simplify right side
    137,780.40x = 9,161,118,837.36
  5. Step 5: Solve for x
    x = 9,161,118,837.36/137,780.40
  6. Step 6: Final answer
    x = 66,490.73

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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.