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Finding the Fourth Proportional to 88.98, 134.18 and 87.36

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Solution

The fourth proportional to 88.98, 134.18 and 87.36 is: 131.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.98 : 134.18 = 87.36 : x
  2. Step 2: Convert to fraction form
    88.98/134.18 = 87.36/x
  3. Step 3: Cross multiply
    88.98x = 134.18 × 87.36
  4. Step 4: Simplify right side
    88.98x = 11,721.96
  5. Step 5: Solve for x
    x = 11,721.96/88.98
  6. Step 6: Final answer
    x = 131.74

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.