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Finding the Fourth Proportional to 72.89, 100.46 and 52.13

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Solution

The fourth proportional to 72.89, 100.46 and 52.13 is: 71.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.89 : 100.46 = 52.13 : x
  2. Step 2: Convert to fraction form
    72.89/100.46 = 52.13/x
  3. Step 3: Cross multiply
    72.89x = 100.46 × 52.13
  4. Step 4: Simplify right side
    72.89x = 5,236.22
  5. Step 5: Solve for x
    x = 5,236.22/72.89
  6. Step 6: Final answer
    x = 71.84

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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.