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Finding the Third Proportional to 77 and 141.50

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Solution

The third proportional to 77 and 141.50 is: 260.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    77 : 141.50 = 141.50 : x
  2. Step 2: Convert to fraction form
    77/141.50 = 141.50/x
  3. Step 3: Cross multiply
    77x = 141.50 × 141.50
  4. Step 4: Simplify right side
    77x = 20,022.25
  5. Step 5: Solve for x
    x = 20,022.25/77
  6. Step 6: Final answer
    x = 260.03

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Why These Related Problems?

These problems maintain the same ratio (1.84) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.