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Finding the Fourth Proportional to 91.37, 137.25 and 55.32

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Solution

The fourth proportional to 91.37, 137.25 and 55.32 is: 83.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    91.37 : 137.25 = 55.32 : x
  2. Step 2: Convert to fraction form
    91.37/137.25 = 55.32/x
  3. Step 3: Cross multiply
    91.37x = 137.25 × 55.32
  4. Step 4: Simplify right side
    91.37x = 7,592.67
  5. Step 5: Solve for x
    x = 7,592.67/91.37
  6. Step 6: Final answer
    x = 83.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.