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Finding the Fourth Proportional to 123,653.68, 170,642.09 and 69,937.55

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Solution

The fourth proportional to 123,653.68, 170,642.09 and 69,937.55 is: 96,513.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,653.68 : 170,642.09 = 69,937.55 : x
  2. Step 2: Convert to fraction form
    123,653.68/170,642.09 = 69,937.55/x
  3. Step 3: Cross multiply
    123,653.68x = 170,642.09 × 69,937.55
  4. Step 4: Simplify right side
    123,653.68x = 11,934,289,351.79
  5. Step 5: Solve for x
    x = 11,934,289,351.79/123,653.68
  6. Step 6: Final answer
    x = 96,513.83

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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.