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Finding the Fourth Proportional to 143.34, 215.14 and 104.32

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Solution

The fourth proportional to 143.34, 215.14 and 104.32 is: 156.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.34 : 215.14 = 104.32 : x
  2. Step 2: Convert to fraction form
    143.34/215.14 = 104.32/x
  3. Step 3: Cross multiply
    143.34x = 215.14 × 104.32
  4. Step 4: Simplify right side
    143.34x = 22,443.40
  5. Step 5: Solve for x
    x = 22,443.40/143.34
  6. Step 6: Final answer
    x = 156.57

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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.