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Finding the Fourth Proportional to 73.65, 110.36 and 70.85

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Solution

The fourth proportional to 73.65, 110.36 and 70.85 is: 106.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.65 : 110.36 = 70.85 : x
  2. Step 2: Convert to fraction form
    73.65/110.36 = 70.85/x
  3. Step 3: Cross multiply
    73.65x = 110.36 × 70.85
  4. Step 4: Simplify right side
    73.65x = 7,818.45
  5. Step 5: Solve for x
    x = 7,818.45/73.65
  6. Step 6: Final answer
    x = 106.16

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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.