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Finding the Fourth Proportional to 101.02, 139.45 and 88.87

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Solution

The fourth proportional to 101.02, 139.45 and 88.87 is: 122.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.02 : 139.45 = 88.87 : x
  2. Step 2: Convert to fraction form
    101.02/139.45 = 88.87/x
  3. Step 3: Cross multiply
    101.02x = 139.45 × 88.87
  4. Step 4: Simplify right side
    101.02x = 12,392.92
  5. Step 5: Solve for x
    x = 12,392.92/101.02
  6. Step 6: Final answer
    x = 122.68

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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.