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Finding the Fourth Proportional to 84.24, 116.32 and 61.05

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Solution

The fourth proportional to 84.24, 116.32 and 61.05 is: 84.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.24 : 116.32 = 61.05 : x
  2. Step 2: Convert to fraction form
    84.24/116.32 = 61.05/x
  3. Step 3: Cross multiply
    84.24x = 116.32 × 61.05
  4. Step 4: Simplify right side
    84.24x = 7,101.34
  5. Step 5: Solve for x
    x = 7,101.34/84.24
  6. Step 6: Final answer
    x = 84.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.