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Finding the Fourth Proportional to 73.75, 110.40 and 48.10

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Solution

The fourth proportional to 73.75, 110.40 and 48.10 is: 72.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.75 : 110.40 = 48.10 : x
  2. Step 2: Convert to fraction form
    73.75/110.40 = 48.10/x
  3. Step 3: Cross multiply
    73.75x = 110.40 × 48.10
  4. Step 4: Simplify right side
    73.75x = 5,310.24
  5. Step 5: Solve for x
    x = 5,310.24/73.75
  6. Step 6: Final answer
    x = 72.00

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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.