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Finding the Fourth Proportional to 66.34, 99.92 and 56.26

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Solution

The fourth proportional to 66.34, 99.92 and 56.26 is: 84.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.34 : 99.92 = 56.26 : x
  2. Step 2: Convert to fraction form
    66.34/99.92 = 56.26/x
  3. Step 3: Cross multiply
    66.34x = 99.92 × 56.26
  4. Step 4: Simplify right side
    66.34x = 5,621.50
  5. Step 5: Solve for x
    x = 5,621.50/66.34
  6. Step 6: Final answer
    x = 84.74

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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.