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Finding the Fourth Proportional to 76.19, 105.17 and 43.47

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Solution

The fourth proportional to 76.19, 105.17 and 43.47 is: 60.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    76.19 : 105.17 = 43.47 : x
  2. Step 2: Convert to fraction form
    76.19/105.17 = 43.47/x
  3. Step 3: Cross multiply
    76.19x = 105.17 × 43.47
  4. Step 4: Simplify right side
    76.19x = 4,571.52
  5. Step 5: Solve for x
    x = 4,571.52/76.19
  6. Step 6: Final answer
    x = 60.01

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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.