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Finding the Fourth Proportional to 74,912.76, 112,467.42 and 58,378.68

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Solution

The fourth proportional to 74,912.76, 112,467.42 and 58,378.68 is: 87,644.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,912.76 : 112,467.42 = 58,378.68 : x
  2. Step 2: Convert to fraction form
    74,912.76/112,467.42 = 58,378.68/x
  3. Step 3: Cross multiply
    74,912.76x = 112,467.42 × 58,378.68
  4. Step 4: Simplify right side
    74,912.76x = 6,565,699,522.61
  5. Step 5: Solve for x
    x = 6,565,699,522.61/74,912.76
  6. Step 6: Final answer
    x = 87,644.61

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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.