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Finding the Fourth Proportional to 59.95, 89.91 and 19.38

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Solution

The fourth proportional to 59.95, 89.91 and 19.38 is: 29.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    59.95 : 89.91 = 19.38 : x
  2. Step 2: Convert to fraction form
    59.95/89.91 = 19.38/x
  3. Step 3: Cross multiply
    59.95x = 89.91 × 19.38
  4. Step 4: Simplify right side
    59.95x = 1,742.46
  5. Step 5: Solve for x
    x = 1,742.46/59.95
  6. Step 6: Final answer
    x = 29.07

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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.