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Finding the Fourth Proportional to 74,261.92, 111,391.03 and 21,671.86

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Solution

The fourth proportional to 74,261.92, 111,391.03 and 21,671.86 is: 32,507.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,261.92 : 111,391.03 = 21,671.86 : x
  2. Step 2: Convert to fraction form
    74,261.92/111,391.03 = 21,671.86/x
  3. Step 3: Cross multiply
    74,261.92x = 111,391.03 × 21,671.86
  4. Step 4: Simplify right side
    74,261.92x = 2,414,050,807.42
  5. Step 5: Solve for x
    x = 2,414,050,807.42/74,261.92
  6. Step 6: Final answer
    x = 32,507.25

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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.