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Finding the Fourth Proportional to 88.58, 131.98 and 86.10

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Solution

The fourth proportional to 88.58, 131.98 and 86.10 is: 128.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.58 : 131.98 = 86.10 : x
  2. Step 2: Convert to fraction form
    88.58/131.98 = 86.10/x
  3. Step 3: Cross multiply
    88.58x = 131.98 × 86.10
  4. Step 4: Simplify right side
    88.58x = 11,363.48
  5. Step 5: Solve for x
    x = 11,363.48/88.58
  6. Step 6: Final answer
    x = 128.28

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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.