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Finding the Fourth Proportional to 60.99, 91.49 and 53.47

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Solution

The fourth proportional to 60.99, 91.49 and 53.47 is: 80.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.99 : 91.49 = 53.47 : x
  2. Step 2: Convert to fraction form
    60.99/91.49 = 53.47/x
  3. Step 3: Cross multiply
    60.99x = 91.49 × 53.47
  4. Step 4: Simplify right side
    60.99x = 4,891.82
  5. Step 5: Solve for x
    x = 4,891.82/60.99
  6. Step 6: Final answer
    x = 80.21

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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.