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Finding the Fourth Proportional to 89.86, 134.12 and 88.06

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Solution

The fourth proportional to 89.86, 134.12 and 88.06 is: 131.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.86 : 134.12 = 88.06 : x
  2. Step 2: Convert to fraction form
    89.86/134.12 = 88.06/x
  3. Step 3: Cross multiply
    89.86x = 134.12 × 88.06
  4. Step 4: Simplify right side
    89.86x = 11,810.61
  5. Step 5: Solve for x
    x = 11,810.61/89.86
  6. Step 6: Final answer
    x = 131.43

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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.