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Finding the Fourth Proportional to 92.50, 139.07 and 73.48

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Solution

The fourth proportional to 92.50, 139.07 and 73.48 is: 110.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.50 : 139.07 = 73.48 : x
  2. Step 2: Convert to fraction form
    92.50/139.07 = 73.48/x
  3. Step 3: Cross multiply
    92.50x = 139.07 × 73.48
  4. Step 4: Simplify right side
    92.50x = 10,218.15
  5. Step 5: Solve for x
    x = 10,218.15/92.50
  6. Step 6: Final answer
    x = 110.47

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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.