Home / 123,276.38-170,121.60-66,687.75

Finding the Fourth Proportional to 123,276.38, 170,121.60 and 66,687.75

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Solution

The fourth proportional to 123,276.38, 170,121.60 and 66,687.75 is: 92,029.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,276.38 : 170,121.60 = 66,687.75 : x
  2. Step 2: Convert to fraction form
    123,276.38/170,121.60 = 66,687.75/x
  3. Step 3: Cross multiply
    123,276.38x = 170,121.60 × 66,687.75
  4. Step 4: Simplify right side
    123,276.38x = 11,345,026,730.40
  5. Step 5: Solve for x
    x = 11,345,026,730.40/123,276.38
  6. Step 6: Final answer
    x = 92,029.20

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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.