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Finding the Fourth Proportional to 62.76, 86.43 and 53.96

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Solution

The fourth proportional to 62.76, 86.43 and 53.96 is: 74.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.76 : 86.43 = 53.96 : x
  2. Step 2: Convert to fraction form
    62.76/86.43 = 53.96/x
  3. Step 3: Cross multiply
    62.76x = 86.43 × 53.96
  4. Step 4: Simplify right side
    62.76x = 4,663.76
  5. Step 5: Solve for x
    x = 4,663.76/62.76
  6. Step 6: Final answer
    x = 74.31

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Find fourth proportional to 31.38, 43.22 and 26.98
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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.