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Finding the Fourth Proportional to 143.90, 215.77 and 46.37

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Solution

The fourth proportional to 143.90, 215.77 and 46.37 is: 69.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.90 : 215.77 = 46.37 : x
  2. Step 2: Convert to fraction form
    143.90/215.77 = 46.37/x
  3. Step 3: Cross multiply
    143.90x = 215.77 × 46.37
  4. Step 4: Simplify right side
    143.90x = 10,005.25
  5. Step 5: Solve for x
    x = 10,005.25/143.90
  6. Step 6: Final answer
    x = 69.53

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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.