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Finding the Fourth Proportional to 71.93, 99.27 and 39.19

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Solution

The fourth proportional to 71.93, 99.27 and 39.19 is: 54.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.93 : 99.27 = 39.19 : x
  2. Step 2: Convert to fraction form
    71.93/99.27 = 39.19/x
  3. Step 3: Cross multiply
    71.93x = 99.27 × 39.19
  4. Step 4: Simplify right side
    71.93x = 3,890.14
  5. Step 5: Solve for x
    x = 3,890.14/71.93
  6. Step 6: Final answer
    x = 54.08

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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.