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Finding the Fourth Proportional to 74,169.68, 110,540.94 and 72,988.72

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Solution

The fourth proportional to 74,169.68, 110,540.94 and 72,988.72 is: 108,780.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,169.68 : 110,540.94 = 72,988.72 : x
  2. Step 2: Convert to fraction form
    74,169.68/110,540.94 = 72,988.72/x
  3. Step 3: Cross multiply
    74,169.68x = 110,540.94 × 72,988.72
  4. Step 4: Simplify right side
    74,169.68x = 8,068,241,718.20
  5. Step 5: Solve for x
    x = 8,068,241,718.20/74,169.68
  6. Step 6: Final answer
    x = 108,780.86

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.