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Finding the Fourth Proportional to 129,871.86, 179,223.30 and 73,288.50

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Solution

The fourth proportional to 129,871.86, 179,223.30 and 73,288.50 is: 101,138.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,871.86 : 179,223.30 = 73,288.50 : x
  2. Step 2: Convert to fraction form
    129,871.86/179,223.30 = 73,288.50/x
  3. Step 3: Cross multiply
    129,871.86x = 179,223.30 × 73,288.50
  4. Step 4: Simplify right side
    129,871.86x = 13,135,006,822.05
  5. Step 5: Solve for x
    x = 13,135,006,822.05/129,871.86
  6. Step 6: Final answer
    x = 101,138.21

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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.