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Finding the Fourth Proportional to 124,586.40, 186,766.20 and 45,681.60

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Solution

The fourth proportional to 124,586.40, 186,766.20 and 45,681.60 is: 68,480.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,586.40 : 186,766.20 = 45,681.60 : x
  2. Step 2: Convert to fraction form
    124,586.40/186,766.20 = 45,681.60/x
  3. Step 3: Cross multiply
    124,586.40x = 186,766.20 × 45,681.60
  4. Step 4: Simplify right side
    124,586.40x = 8,531,778,841.92
  5. Step 5: Solve for x
    x = 8,531,778,841.92/124,586.40
  6. Step 6: Final answer
    x = 68,480.82

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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.