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Finding the Fourth Proportional to 147.48, 203.55 and 112.45

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Solution

The fourth proportional to 147.48, 203.55 and 112.45 is: 155.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.48 : 203.55 = 112.45 : x
  2. Step 2: Convert to fraction form
    147.48/203.55 = 112.45/x
  3. Step 3: Cross multiply
    147.48x = 203.55 × 112.45
  4. Step 4: Simplify right side
    147.48x = 22,888.64
  5. Step 5: Solve for x
    x = 22,888.64/147.48
  6. Step 6: Final answer
    x = 155.20

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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.