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Finding the Fourth Proportional to 52.16, 72.02 and 35.81

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Solution

The fourth proportional to 52.16, 72.02 and 35.81 is: 49.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.16 : 72.02 = 35.81 : x
  2. Step 2: Convert to fraction form
    52.16/72.02 = 35.81/x
  3. Step 3: Cross multiply
    52.16x = 72.02 × 35.81
  4. Step 4: Simplify right side
    52.16x = 2,579.04
  5. Step 5: Solve for x
    x = 2,579.04/52.16
  6. Step 6: Final answer
    x = 49.44

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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.