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Finding the Fourth Proportional to 112.02, 168.07 and 43.59

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Solution

The fourth proportional to 112.02, 168.07 and 43.59 is: 65.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.02 : 168.07 = 43.59 : x
  2. Step 2: Convert to fraction form
    112.02/168.07 = 43.59/x
  3. Step 3: Cross multiply
    112.02x = 168.07 × 43.59
  4. Step 4: Simplify right side
    112.02x = 7,325.35
  5. Step 5: Solve for x
    x = 7,325.35/112.02
  6. Step 6: Final answer
    x = 65.40

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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.