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Finding the Fourth Proportional to 124,429.20, 186,643.80 and 113,542.80

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Solution

The fourth proportional to 124,429.20, 186,643.80 and 113,542.80 is: 170,314.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,429.20 : 186,643.80 = 113,542.80 : x
  2. Step 2: Convert to fraction form
    124,429.20/186,643.80 = 113,542.80/x
  3. Step 3: Cross multiply
    124,429.20x = 186,643.80 × 113,542.80
  4. Step 4: Simplify right side
    124,429.20x = 21,192,059,654.64
  5. Step 5: Solve for x
    x = 21,192,059,654.64/124,429.20
  6. Step 6: Final answer
    x = 170,314.20

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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.