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Finding the Fourth Proportional to 66.04, 99.49 and 59.71

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Solution

The fourth proportional to 66.04, 99.49 and 59.71 is: 89.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.04 : 99.49 = 59.71 : x
  2. Step 2: Convert to fraction form
    66.04/99.49 = 59.71/x
  3. Step 3: Cross multiply
    66.04x = 99.49 × 59.71
  4. Step 4: Simplify right side
    66.04x = 5,940.55
  5. Step 5: Solve for x
    x = 5,940.55/66.04
  6. Step 6: Final answer
    x = 89.95

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.