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Finding the Fourth Proportional to 73.40, 110.76 and 70.72

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Solution

The fourth proportional to 73.40, 110.76 and 70.72 is: 106.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.40 : 110.76 = 70.72 : x
  2. Step 2: Convert to fraction form
    73.40/110.76 = 70.72/x
  3. Step 3: Cross multiply
    73.40x = 110.76 × 70.72
  4. Step 4: Simplify right side
    73.40x = 7,832.95
  5. Step 5: Solve for x
    x = 7,832.95/73.40
  6. Step 6: Final answer
    x = 106.72

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.