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Finding the Fourth Proportional to 147.04, 203.01 and 128.82

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Solution

The fourth proportional to 147.04, 203.01 and 128.82 is: 177.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.04 : 203.01 = 128.82 : x
  2. Step 2: Convert to fraction form
    147.04/203.01 = 128.82/x
  3. Step 3: Cross multiply
    147.04x = 203.01 × 128.82
  4. Step 4: Simplify right side
    147.04x = 26,151.75
  5. Step 5: Solve for x
    x = 26,151.75/147.04
  6. Step 6: Final answer
    x = 177.85

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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.