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Finding the Fourth Proportional to 123,238.80, 170,068.58 and 66,650.18

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Solution

The fourth proportional to 123,238.80, 170,068.58 and 66,650.18 is: 91,976.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,238.80 : 170,068.58 = 66,650.18 : x
  2. Step 2: Convert to fraction form
    123,238.80/170,068.58 = 66,650.18/x
  3. Step 3: Cross multiply
    123,238.80x = 170,068.58 × 66,650.18
  4. Step 4: Simplify right side
    123,238.80x = 11,335,100,535.69
  5. Step 5: Solve for x
    x = 11,335,100,535.69/123,238.80
  6. Step 6: Final answer
    x = 91,976.72

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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.