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Finding the Fourth Proportional to 101.06, 139.01 and 88.55

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Solution

The fourth proportional to 101.06, 139.01 and 88.55 is: 121.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.06 : 139.01 = 88.55 : x
  2. Step 2: Convert to fraction form
    101.06/139.01 = 88.55/x
  3. Step 3: Cross multiply
    101.06x = 139.01 × 88.55
  4. Step 4: Simplify right side
    101.06x = 12,308.20
  5. Step 5: Solve for x
    x = 12,308.20/101.06
  6. Step 6: Final answer
    x = 121.80

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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.