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Finding the Fourth Proportional to 73.76, 109.72 and 73.52

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Solution

The fourth proportional to 73.76, 109.72 and 73.52 is: 109.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.76 : 109.72 = 73.52 : x
  2. Step 2: Convert to fraction form
    73.76/109.72 = 73.52/x
  3. Step 3: Cross multiply
    73.76x = 109.72 × 73.52
  4. Step 4: Simplify right side
    73.76x = 8,066.61
  5. Step 5: Solve for x
    x = 8,066.61/73.76
  6. Step 6: Final answer
    x = 109.36

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.