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Finding the Fourth Proportional to 66.34, 99.08 and 56.08

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Solution

The fourth proportional to 66.34, 99.08 and 56.08 is: 83.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.34 : 99.08 = 56.08 : x
  2. Step 2: Convert to fraction form
    66.34/99.08 = 56.08/x
  3. Step 3: Cross multiply
    66.34x = 99.08 × 56.08
  4. Step 4: Simplify right side
    66.34x = 5,556.41
  5. Step 5: Solve for x
    x = 5,556.41/66.34
  6. Step 6: Final answer
    x = 83.76

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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.