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Finding the Fourth Proportional to 66.83, 99.63 and 60.35

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Solution

The fourth proportional to 66.83, 99.63 and 60.35 is: 89.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.83 : 99.63 = 60.35 : x
  2. Step 2: Convert to fraction form
    66.83/99.63 = 60.35/x
  3. Step 3: Cross multiply
    66.83x = 99.63 × 60.35
  4. Step 4: Simplify right side
    66.83x = 6,012.17
  5. Step 5: Solve for x
    x = 6,012.17/66.83
  6. Step 6: Final answer
    x = 89.97

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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.