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Finding the Fourth Proportional to 153.76, 229.67 and 129.46

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Solution

The fourth proportional to 153.76, 229.67 and 129.46 is: 193.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.76 : 229.67 = 129.46 : x
  2. Step 2: Convert to fraction form
    153.76/229.67 = 129.46/x
  3. Step 3: Cross multiply
    153.76x = 229.67 × 129.46
  4. Step 4: Simplify right side
    153.76x = 29,733.08
  5. Step 5: Solve for x
    x = 29,733.08/153.76
  6. Step 6: Final answer
    x = 193.37

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.