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Finding the Fourth Proportional to 74,408.92, 102,685.04 and 40,417.72

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Solution

The fourth proportional to 74,408.92, 102,685.04 and 40,417.72 is: 55,776.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,408.92 : 102,685.04 = 40,417.72 : x
  2. Step 2: Convert to fraction form
    74,408.92/102,685.04 = 40,417.72/x
  3. Step 3: Cross multiply
    74,408.92x = 102,685.04 × 40,417.72
  4. Step 4: Simplify right side
    74,408.92x = 4,150,295,194.91
  5. Step 5: Solve for x
    x = 4,150,295,194.91/74,408.92
  6. Step 6: Final answer
    x = 55,776.85

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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.