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Finding the Fourth Proportional to 74,712.60, 111,939.30 and 48,403.80

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Solution

The fourth proportional to 74,712.60, 111,939.30 and 48,403.80 is: 72,521.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,712.60 : 111,939.30 = 48,403.80 : x
  2. Step 2: Convert to fraction form
    74,712.60/111,939.30 = 48,403.80/x
  3. Step 3: Cross multiply
    74,712.60x = 111,939.30 × 48,403.80
  4. Step 4: Simplify right side
    74,712.60x = 5,418,287,489.34
  5. Step 5: Solve for x
    x = 5,418,287,489.34/74,712.60
  6. Step 6: Final answer
    x = 72,521.74

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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.