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Finding the Fourth Proportional to 91.37, 137.06 and 59.51

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Solution

The fourth proportional to 91.37, 137.06 and 59.51 is: 89.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    91.37 : 137.06 = 59.51 : x
  2. Step 2: Convert to fraction form
    91.37/137.06 = 59.51/x
  3. Step 3: Cross multiply
    91.37x = 137.06 × 59.51
  4. Step 4: Simplify right side
    91.37x = 8,156.44
  5. Step 5: Solve for x
    x = 8,156.44/91.37
  6. Step 6: Final answer
    x = 89.27

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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.