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Finding the Fourth Proportional to 73.32, 109.68 and 58.72

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Solution

The fourth proportional to 73.32, 109.68 and 58.72 is: 87.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.32 : 109.68 = 58.72 : x
  2. Step 2: Convert to fraction form
    73.32/109.68 = 58.72/x
  3. Step 3: Cross multiply
    73.32x = 109.68 × 58.72
  4. Step 4: Simplify right side
    73.32x = 6,440.41
  5. Step 5: Solve for x
    x = 6,440.41/73.32
  6. Step 6: Final answer
    x = 87.84

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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.