Home / 206,619.80-309,634.02-117,689.72

Finding the Fourth Proportional to 206,619.80, 309,634.02 and 117,689.72

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Solution

The fourth proportional to 206,619.80, 309,634.02 and 117,689.72 is: 176,366.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,619.80 : 309,634.02 = 117,689.72 : x
  2. Step 2: Convert to fraction form
    206,619.80/309,634.02 = 117,689.72/x
  3. Step 3: Cross multiply
    206,619.80x = 309,634.02 × 117,689.72
  4. Step 4: Simplify right side
    206,619.80x = 36,440,739,568.10
  5. Step 5: Solve for x
    x = 36,440,739,568.10/206,619.80
  6. Step 6: Final answer
    x = 176,366.16

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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.