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Finding the Fourth Proportional to 48,391.40, 72,491.10 and 42,618.60

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Solution

The fourth proportional to 48,391.40, 72,491.10 and 42,618.60 is: 63,843.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,391.40 : 72,491.10 = 42,618.60 : x
  2. Step 2: Convert to fraction form
    48,391.40/72,491.10 = 42,618.60/x
  3. Step 3: Cross multiply
    48,391.40x = 72,491.10 × 42,618.60
  4. Step 4: Simplify right side
    48,391.40x = 3,089,469,194.46
  5. Step 5: Solve for x
    x = 3,089,469,194.46/48,391.40
  6. Step 6: Final answer
    x = 63,843.35

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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.