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Finding the Fourth Proportional to 91.46, 137.14 and 43.36

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Solution

The fourth proportional to 91.46, 137.14 and 43.36 is: 65.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    91.46 : 137.14 = 43.36 : x
  2. Step 2: Convert to fraction form
    91.46/137.14 = 43.36/x
  3. Step 3: Cross multiply
    91.46x = 137.14 × 43.36
  4. Step 4: Simplify right side
    91.46x = 5,946.39
  5. Step 5: Solve for x
    x = 5,946.39/91.46
  6. Step 6: Final answer
    x = 65.02

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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.