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Finding the Fourth Proportional to 73.10, 109.45 and 48.68

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Solution

The fourth proportional to 73.10, 109.45 and 48.68 is: 72.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.10 : 109.45 = 48.68 : x
  2. Step 2: Convert to fraction form
    73.10/109.45 = 48.68/x
  3. Step 3: Cross multiply
    73.10x = 109.45 × 48.68
  4. Step 4: Simplify right side
    73.10x = 5,328.03
  5. Step 5: Solve for x
    x = 5,328.03/73.10
  6. Step 6: Final answer
    x = 72.89

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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.