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Finding the Fourth Proportional to 67.43, 93.18 and 53.58

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Solution

The fourth proportional to 67.43, 93.18 and 53.58 is: 74.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.43 : 93.18 = 53.58 : x
  2. Step 2: Convert to fraction form
    67.43/93.18 = 53.58/x
  3. Step 3: Cross multiply
    67.43x = 93.18 × 53.58
  4. Step 4: Simplify right side
    67.43x = 4,993.13
  5. Step 5: Solve for x
    x = 4,993.13/67.43
  6. Step 6: Final answer
    x = 74.05

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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.