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Finding the Fourth Proportional to 104.57, 144.99 and 99.10

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Solution

The fourth proportional to 104.57, 144.99 and 99.10 is: 137.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.57 : 144.99 = 99.10 : x
  2. Step 2: Convert to fraction form
    104.57/144.99 = 99.10/x
  3. Step 3: Cross multiply
    104.57x = 144.99 × 99.10
  4. Step 4: Simplify right side
    104.57x = 14,368.51
  5. Step 5: Solve for x
    x = 14,368.51/104.57
  6. Step 6: Final answer
    x = 137.41

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.