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Finding the Fourth Proportional to 84.63, 116.82 and 53.58

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Solution

The fourth proportional to 84.63, 116.82 and 53.58 is: 73.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.63 : 116.82 = 53.58 : x
  2. Step 2: Convert to fraction form
    84.63/116.82 = 53.58/x
  3. Step 3: Cross multiply
    84.63x = 116.82 × 53.58
  4. Step 4: Simplify right side
    84.63x = 6,259.22
  5. Step 5: Solve for x
    x = 6,259.22/84.63
  6. Step 6: Final answer
    x = 73.96

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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.