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Finding the Fourth Proportional to 124,434.74, 186,839.03 and 71,186.84

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Solution

The fourth proportional to 124,434.74, 186,839.03 and 71,186.84 is: 106,887.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,434.74 : 186,839.03 = 71,186.84 : x
  2. Step 2: Convert to fraction form
    124,434.74/186,839.03 = 71,186.84/x
  3. Step 3: Cross multiply
    124,434.74x = 186,839.03 × 71,186.84
  4. Step 4: Simplify right side
    124,434.74x = 13,300,480,078.78
  5. Step 5: Solve for x
    x = 13,300,480,078.78/124,434.74
  6. Step 6: Final answer
    x = 106,887.19

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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.