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Finding the Fourth Proportional to 74,673.72, 103,049.76 and 41,139.72

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Solution

The fourth proportional to 74,673.72, 103,049.76 and 41,139.72 is: 56,772.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,673.72 : 103,049.76 = 41,139.72 : x
  2. Step 2: Convert to fraction form
    74,673.72/103,049.76 = 41,139.72/x
  3. Step 3: Cross multiply
    74,673.72x = 103,049.76 × 41,139.72
  4. Step 4: Simplify right side
    74,673.72x = 4,239,438,272.47
  5. Step 5: Solve for x
    x = 4,239,438,272.47/74,673.72
  6. Step 6: Final answer
    x = 56,772.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.