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Finding the Fourth Proportional to 88.45, 131.54 and 86.02

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Solution

The fourth proportional to 88.45, 131.54 and 86.02 is: 127.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.45 : 131.54 = 86.02 : x
  2. Step 2: Convert to fraction form
    88.45/131.54 = 86.02/x
  3. Step 3: Cross multiply
    88.45x = 131.54 × 86.02
  4. Step 4: Simplify right side
    88.45x = 11,314.31
  5. Step 5: Solve for x
    x = 11,314.31/88.45
  6. Step 6: Final answer
    x = 127.92

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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.