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Finding the Fourth Proportional to 61.15, 91.54 and 50.35

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Solution

The fourth proportional to 61.15, 91.54 and 50.35 is: 75.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.15 : 91.54 = 50.35 : x
  2. Step 2: Convert to fraction form
    61.15/91.54 = 50.35/x
  3. Step 3: Cross multiply
    61.15x = 91.54 × 50.35
  4. Step 4: Simplify right side
    61.15x = 4,609.04
  5. Step 5: Solve for x
    x = 4,609.04/61.15
  6. Step 6: Final answer
    x = 75.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.