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Finding the Fourth Proportional to 153.53, 212.10 and 124.37

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Solution

The fourth proportional to 153.53, 212.10 and 124.37 is: 171.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.53 : 212.10 = 124.37 : x
  2. Step 2: Convert to fraction form
    153.53/212.10 = 124.37/x
  3. Step 3: Cross multiply
    153.53x = 212.10 × 124.37
  4. Step 4: Simplify right side
    153.53x = 26,378.88
  5. Step 5: Solve for x
    x = 26,378.88/153.53
  6. Step 6: Final answer
    x = 171.82

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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.