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Finding the Fourth Proportional to 88.51, 132.78 and 47.86

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Solution

The fourth proportional to 88.51, 132.78 and 47.86 is: 71.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.51 : 132.78 = 47.86 : x
  2. Step 2: Convert to fraction form
    88.51/132.78 = 47.86/x
  3. Step 3: Cross multiply
    88.51x = 132.78 × 47.86
  4. Step 4: Simplify right side
    88.51x = 6,354.85
  5. Step 5: Solve for x
    x = 6,354.85/88.51
  6. Step 6: Final answer
    x = 71.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.