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Finding the Fourth Proportional to 74.82, 103.32 and 62.58

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Solution

The fourth proportional to 74.82, 103.32 and 62.58 is: 86.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.82 : 103.32 = 62.58 : x
  2. Step 2: Convert to fraction form
    74.82/103.32 = 62.58/x
  3. Step 3: Cross multiply
    74.82x = 103.32 × 62.58
  4. Step 4: Simplify right side
    74.82x = 6,465.77
  5. Step 5: Solve for x
    x = 6,465.77/74.82
  6. Step 6: Final answer
    x = 86.42

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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.