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Finding the Fourth Proportional to 123,640.20, 185,417.10 and 64,456.20

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Solution

The fourth proportional to 123,640.20, 185,417.10 and 64,456.20 is: 96,661.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,640.20 : 185,417.10 = 64,456.20 : x
  2. Step 2: Convert to fraction form
    123,640.20/185,417.10 = 64,456.20/x
  3. Step 3: Cross multiply
    123,640.20x = 185,417.10 × 64,456.20
  4. Step 4: Simplify right side
    123,640.20x = 11,951,281,681.02
  5. Step 5: Solve for x
    x = 11,951,281,681.02/123,640.20
  6. Step 6: Final answer
    x = 96,661.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.