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Finding the Fourth Proportional to 74,865.74, 112,397.01 and 68,676.53

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Solution

The fourth proportional to 74,865.74, 112,397.01 and 68,676.53 is: 103,105.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,865.74 : 112,397.01 = 68,676.53 : x
  2. Step 2: Convert to fraction form
    74,865.74/112,397.01 = 68,676.53/x
  3. Step 3: Cross multiply
    74,865.74x = 112,397.01 × 68,676.53
  4. Step 4: Simplify right side
    74,865.74x = 7,719,036,067.19
  5. Step 5: Solve for x
    x = 7,719,036,067.19/74,865.74
  6. Step 6: Final answer
    x = 103,105.06

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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.