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Finding the Fourth Proportional to 79.15, 118.47 and 43.03

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Solution

The fourth proportional to 79.15, 118.47 and 43.03 is: 64.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.15 : 118.47 = 43.03 : x
  2. Step 2: Convert to fraction form
    79.15/118.47 = 43.03/x
  3. Step 3: Cross multiply
    79.15x = 118.47 × 43.03
  4. Step 4: Simplify right side
    79.15x = 5,097.76
  5. Step 5: Solve for x
    x = 5,097.76/79.15
  6. Step 6: Final answer
    x = 64.41

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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.