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Finding the Fourth Proportional to 74,685.60, 111,898.80 and 48,376.80

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Solution

The fourth proportional to 74,685.60, 111,898.80 and 48,376.80 is: 72,481.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,685.60 : 111,898.80 = 48,376.80 : x
  2. Step 2: Convert to fraction form
    74,685.60/111,898.80 = 48,376.80/x
  3. Step 3: Cross multiply
    74,685.60x = 111,898.80 × 48,376.80
  4. Step 4: Simplify right side
    74,685.60x = 5,413,305,867.84
  5. Step 5: Solve for x
    x = 5,413,305,867.84/74,685.60
  6. Step 6: Final answer
    x = 72,481.25

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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.