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Finding the Fourth Proportional to 129,571.98, 178,703.61 and 108,795.29

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Solution

The fourth proportional to 129,571.98, 178,703.61 and 108,795.29 is: 150,048.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,571.98 : 178,703.61 = 108,795.29 : x
  2. Step 2: Convert to fraction form
    129,571.98/178,703.61 = 108,795.29/x
  3. Step 3: Cross multiply
    129,571.98x = 178,703.61 × 108,795.29
  4. Step 4: Simplify right side
    129,571.98x = 19,442,110,180.48
  5. Step 5: Solve for x
    x = 19,442,110,180.48/129,571.98
  6. Step 6: Final answer
    x = 150,048.72

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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.