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Finding the Fourth Proportional to 152.92, 210.96 and 100.44

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Solution

The fourth proportional to 152.92, 210.96 and 100.44 is: 138.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.92 : 210.96 = 100.44 : x
  2. Step 2: Convert to fraction form
    152.92/210.96 = 100.44/x
  3. Step 3: Cross multiply
    152.92x = 210.96 × 100.44
  4. Step 4: Simplify right side
    152.92x = 21,188.82
  5. Step 5: Solve for x
    x = 21,188.82/152.92
  6. Step 6: Final answer
    x = 138.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.