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Finding the Fourth Proportional to 124,146.92, 171,310.90 and 69,686.61

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Solution

The fourth proportional to 124,146.92, 171,310.90 and 69,686.61 is: 96,160.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,146.92 : 171,310.90 = 69,686.61 : x
  2. Step 2: Convert to fraction form
    124,146.92/171,310.90 = 69,686.61/x
  3. Step 3: Cross multiply
    124,146.92x = 171,310.90 × 69,686.61
  4. Step 4: Simplify right side
    124,146.92x = 11,938,075,877.05
  5. Step 5: Solve for x
    x = 11,938,075,877.05/124,146.92
  6. Step 6: Final answer
    x = 96,160.87

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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.