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Finding the Fourth Proportional to 147.68, 203.48 and 105.63

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Solution

The fourth proportional to 147.68, 203.48 and 105.63 is: 145.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.68 : 203.48 = 105.63 : x
  2. Step 2: Convert to fraction form
    147.68/203.48 = 105.63/x
  3. Step 3: Cross multiply
    147.68x = 203.48 × 105.63
  4. Step 4: Simplify right side
    147.68x = 21,493.06
  5. Step 5: Solve for x
    x = 21,493.06/147.68
  6. Step 6: Final answer
    x = 145.54

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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.