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Finding the Fourth Proportional to 144.50, 216.62 and 57.90

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Solution

The fourth proportional to 144.50, 216.62 and 57.90 is: 86.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.50 : 216.62 = 57.90 : x
  2. Step 2: Convert to fraction form
    144.50/216.62 = 57.90/x
  3. Step 3: Cross multiply
    144.50x = 216.62 × 57.90
  4. Step 4: Simplify right side
    144.50x = 12,541.36
  5. Step 5: Solve for x
    x = 12,541.36/144.50
  6. Step 6: Final answer
    x = 86.79

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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.