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Finding the Fourth Proportional to 75.83, 113.61 and 45.29

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Solution

The fourth proportional to 75.83, 113.61 and 45.29 is: 67.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    75.83 : 113.61 = 45.29 : x
  2. Step 2: Convert to fraction form
    75.83/113.61 = 45.29/x
  3. Step 3: Cross multiply
    75.83x = 113.61 × 45.29
  4. Step 4: Simplify right side
    75.83x = 5,144.83
  5. Step 5: Solve for x
    x = 5,144.83/75.83
  6. Step 6: Final answer
    x = 67.85

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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.