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Finding the Fourth Proportional to 73.60, 110.45 and 70.81

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Solution

The fourth proportional to 73.60, 110.45 and 70.81 is: 106.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.60 : 110.45 = 70.81 : x
  2. Step 2: Convert to fraction form
    73.60/110.45 = 70.81/x
  3. Step 3: Cross multiply
    73.60x = 110.45 × 70.81
  4. Step 4: Simplify right side
    73.60x = 7,820.96
  5. Step 5: Solve for x
    x = 7,820.96/73.60
  6. Step 6: Final answer
    x = 106.26

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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.