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Finding the Fourth Proportional to 88.03, 131.11 and 86.41

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Solution

The fourth proportional to 88.03, 131.11 and 86.41 is: 128.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.03 : 131.11 = 86.41 : x
  2. Step 2: Convert to fraction form
    88.03/131.11 = 86.41/x
  3. Step 3: Cross multiply
    88.03x = 131.11 × 86.41
  4. Step 4: Simplify right side
    88.03x = 11,329.22
  5. Step 5: Solve for x
    x = 11,329.22/88.03
  6. Step 6: Final answer
    x = 128.70

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.