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Finding the Fourth Proportional to 75.77, 113.69 and 32.43

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Solution

The fourth proportional to 75.77, 113.69 and 32.43 is: 48.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    75.77 : 113.69 = 32.43 : x
  2. Step 2: Convert to fraction form
    75.77/113.69 = 32.43/x
  3. Step 3: Cross multiply
    75.77x = 113.69 × 32.43
  4. Step 4: Simplify right side
    75.77x = 3,686.97
  5. Step 5: Solve for x
    x = 3,686.97/75.77
  6. Step 6: Final answer
    x = 48.66

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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.