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Finding the Fourth Proportional to 75.86, 113.52 and 61.49

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Solution

The fourth proportional to 75.86, 113.52 and 61.49 is: 92.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    75.86 : 113.52 = 61.49 : x
  2. Step 2: Convert to fraction form
    75.86/113.52 = 61.49/x
  3. Step 3: Cross multiply
    75.86x = 113.52 × 61.49
  4. Step 4: Simplify right side
    75.86x = 6,980.34
  5. Step 5: Solve for x
    x = 6,980.34/75.86
  6. Step 6: Final answer
    x = 92.02

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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.