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Finding the Fourth Proportional to 123,205.56, 170,023.66 and 66,616.93

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Solution

The fourth proportional to 123,205.56, 170,023.66 and 66,616.93 is: 91,931.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,205.56 : 170,023.66 = 66,616.93 : x
  2. Step 2: Convert to fraction form
    123,205.56/170,023.66 = 66,616.93/x
  3. Step 3: Cross multiply
    123,205.56x = 170,023.66 × 66,616.93
  4. Step 4: Simplify right side
    123,205.56x = 11,326,454,302.55
  5. Step 5: Solve for x
    x = 11,326,454,302.55/123,205.56
  6. Step 6: Final answer
    x = 91,931.36

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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.