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Finding the Fourth Proportional to 100.97, 139.34 and 59.55

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Solution

The fourth proportional to 100.97, 139.34 and 59.55 is: 82.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    100.97 : 139.34 = 59.55 : x
  2. Step 2: Convert to fraction form
    100.97/139.34 = 59.55/x
  3. Step 3: Cross multiply
    100.97x = 139.34 × 59.55
  4. Step 4: Simplify right side
    100.97x = 8,297.32
  5. Step 5: Solve for x
    x = 8,297.32/100.97
  6. Step 6: Final answer
    x = 82.18

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