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Finding the Fourth Proportional to 74,269.85, 102,489.53 and 40,277.71

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Solution

The fourth proportional to 74,269.85, 102,489.53 and 40,277.71 is: 55,581.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,269.85 : 102,489.53 = 40,277.71 : x
  2. Step 2: Convert to fraction form
    74,269.85/102,489.53 = 40,277.71/x
  3. Step 3: Cross multiply
    74,269.85x = 102,489.53 × 40,277.71
  4. Step 4: Simplify right side
    74,269.85x = 4,128,043,567.38
  5. Step 5: Solve for x
    x = 4,128,043,567.38/74,269.85
  6. Step 6: Final answer
    x = 55,581.69

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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.