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Finding the Fourth Proportional to 153.88, 229.68 and 141.68

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Solution

The fourth proportional to 153.88, 229.68 and 141.68 is: 211.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.88 : 229.68 = 141.68 : x
  2. Step 2: Convert to fraction form
    153.88/229.68 = 141.68/x
  3. Step 3: Cross multiply
    153.88x = 229.68 × 141.68
  4. Step 4: Simplify right side
    153.88x = 32,541.06
  5. Step 5: Solve for x
    x = 32,541.06/153.88
  6. Step 6: Final answer
    x = 211.47

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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.