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Finding the Fourth Proportional to 147.52, 203.36 and 121.60

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Solution

The fourth proportional to 147.52, 203.36 and 121.60 is: 167.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.52 : 203.36 = 121.60 : x
  2. Step 2: Convert to fraction form
    147.52/203.36 = 121.60/x
  3. Step 3: Cross multiply
    147.52x = 203.36 × 121.60
  4. Step 4: Simplify right side
    147.52x = 24,728.58
  5. Step 5: Solve for x
    x = 24,728.58/147.52
  6. Step 6: Final answer
    x = 167.63

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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.