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Finding the Fourth Proportional to 63.76, 88.05 and 51.55

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Solution

The fourth proportional to 63.76, 88.05 and 51.55 is: 71.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.76 : 88.05 = 51.55 : x
  2. Step 2: Convert to fraction form
    63.76/88.05 = 51.55/x
  3. Step 3: Cross multiply
    63.76x = 88.05 × 51.55
  4. Step 4: Simplify right side
    63.76x = 4,538.98
  5. Step 5: Solve for x
    x = 4,538.98/63.76
  6. Step 6: Final answer
    x = 71.19

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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.