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Finding the Fourth Proportional to 136,572.89, 188,469.91 and 79,223.81

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Solution

The fourth proportional to 136,572.89, 188,469.91 and 79,223.81 is: 109,328.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,572.89 : 188,469.91 = 79,223.81 : x
  2. Step 2: Convert to fraction form
    136,572.89/188,469.91 = 79,223.81/x
  3. Step 3: Cross multiply
    136,572.89x = 188,469.91 × 79,223.81
  4. Step 4: Simplify right side
    136,572.89x = 14,931,304,340.56
  5. Step 5: Solve for x
    x = 14,931,304,340.56/136,572.89
  6. Step 6: Final answer
    x = 109,328.46

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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.