Home / 123,691.19-170,605.85-113,515.09

Finding the Fourth Proportional to 123,691.19, 170,605.85 and 113,515.09

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Solution

The fourth proportional to 123,691.19, 170,605.85 and 113,515.09 is: 156,570.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,691.19 : 170,605.85 = 113,515.09 : x
  2. Step 2: Convert to fraction form
    123,691.19/170,605.85 = 113,515.09/x
  3. Step 3: Cross multiply
    123,691.19x = 170,605.85 × 113,515.09
  4. Step 4: Simplify right side
    123,691.19x = 19,366,336,996.67
  5. Step 5: Solve for x
    x = 19,366,336,996.67/123,691.19
  6. Step 6: Final answer
    x = 156,570.06

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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.