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Finding the Fourth Proportional to 66.16, 99.04 and 62.80

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Solution

The fourth proportional to 66.16, 99.04 and 62.80 is: 94.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.16 : 99.04 = 62.80 : x
  2. Step 2: Convert to fraction form
    66.16/99.04 = 62.80/x
  3. Step 3: Cross multiply
    66.16x = 99.04 × 62.80
  4. Step 4: Simplify right side
    66.16x = 6,219.71
  5. Step 5: Solve for x
    x = 6,219.71/66.16
  6. Step 6: Final answer
    x = 94.01

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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.