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Finding the Fourth Proportional to 91.65, 137.55 and 46.02

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Solution

The fourth proportional to 91.65, 137.55 and 46.02 is: 69.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    91.65 : 137.55 = 46.02 : x
  2. Step 2: Convert to fraction form
    91.65/137.55 = 46.02/x
  3. Step 3: Cross multiply
    91.65x = 137.55 × 46.02
  4. Step 4: Simplify right side
    91.65x = 6,330.05
  5. Step 5: Solve for x
    x = 6,330.05/91.65
  6. Step 6: Final answer
    x = 69.07

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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.