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Finding the Fourth Proportional to 63.24, 87.35 and 55.05

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Solution

The fourth proportional to 63.24, 87.35 and 55.05 is: 76.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.24 : 87.35 = 55.05 : x
  2. Step 2: Convert to fraction form
    63.24/87.35 = 55.05/x
  3. Step 3: Cross multiply
    63.24x = 87.35 × 55.05
  4. Step 4: Simplify right side
    63.24x = 4,808.34
  5. Step 5: Solve for x
    x = 4,808.34/63.24
  6. Step 6: Final answer
    x = 76.03

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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.