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Finding the Fourth Proportional to 124,557.40, 186,836.10 and 74,693.80

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Solution

The fourth proportional to 124,557.40, 186,836.10 and 74,693.80 is: 112,040.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,557.40 : 186,836.10 = 74,693.80 : x
  2. Step 2: Convert to fraction form
    124,557.40/186,836.10 = 74,693.80/x
  3. Step 3: Cross multiply
    124,557.40x = 186,836.10 × 74,693.80
  4. Step 4: Simplify right side
    124,557.40x = 13,955,498,286.18
  5. Step 5: Solve for x
    x = 13,955,498,286.18/124,557.40
  6. Step 6: Final answer
    x = 112,040.70

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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.