Home / 137,729.10-206,593.65-78,680.10

Finding the Fourth Proportional to 137,729.10, 206,593.65 and 78,680.10

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Solution

The fourth proportional to 137,729.10, 206,593.65 and 78,680.10 is: 118,020.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,729.10 : 206,593.65 = 78,680.10 : x
  2. Step 2: Convert to fraction form
    137,729.10/206,593.65 = 78,680.10/x
  3. Step 3: Cross multiply
    137,729.10x = 206,593.65 × 78,680.10
  4. Step 4: Simplify right side
    137,729.10x = 16,254,809,041.37
  5. Step 5: Solve for x
    x = 16,254,809,041.37/137,729.10
  6. Step 6: Final answer
    x = 118,020.15

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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.