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Finding the Fourth Proportional to 203.04, 279.88 and 129.32

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Solution

The fourth proportional to 203.04, 279.88 and 129.32 is: 178.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.04 : 279.88 = 129.32 : x
  2. Step 2: Convert to fraction form
    203.04/279.88 = 129.32/x
  3. Step 3: Cross multiply
    203.04x = 279.88 × 129.32
  4. Step 4: Simplify right side
    203.04x = 36,194.08
  5. Step 5: Solve for x
    x = 36,194.08/203.04
  6. Step 6: Final answer
    x = 178.26

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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.