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Finding the Fourth Proportional to 52.10, 71.89 and 29.10

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Solution

The fourth proportional to 52.10, 71.89 and 29.10 is: 40.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.10 : 71.89 = 29.10 : x
  2. Step 2: Convert to fraction form
    52.10/71.89 = 29.10/x
  3. Step 3: Cross multiply
    52.10x = 71.89 × 29.10
  4. Step 4: Simplify right side
    52.10x = 2,091.64
  5. Step 5: Solve for x
    x = 2,091.64/52.10
  6. Step 6: Final answer
    x = 40.15

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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.