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Finding the Fourth Proportional to 144.41, 216.61 and 53.08

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Solution

The fourth proportional to 144.41, 216.61 and 53.08 is: 79.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.41 : 216.61 = 53.08 : x
  2. Step 2: Convert to fraction form
    144.41/216.61 = 53.08/x
  3. Step 3: Cross multiply
    144.41x = 216.61 × 53.08
  4. Step 4: Simplify right side
    144.41x = 11,496.98
  5. Step 5: Solve for x
    x = 11,496.98/144.41
  6. Step 6: Final answer
    x = 79.62

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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.