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Finding the Fourth Proportional to 59.80, 89.12 and 53.38

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Solution

The fourth proportional to 59.80, 89.12 and 53.38 is: 79.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    59.80 : 89.12 = 53.38 : x
  2. Step 2: Convert to fraction form
    59.80/89.12 = 53.38/x
  3. Step 3: Cross multiply
    59.80x = 89.12 × 53.38
  4. Step 4: Simplify right side
    59.80x = 4,757.23
  5. Step 5: Solve for x
    x = 4,757.23/59.80
  6. Step 6: Final answer
    x = 79.55

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.