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Finding the Third Proportional to 130.75 and 156.50

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Solution

The third proportional to 130.75 and 156.50 is: 187.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.75 : 156.50 = 156.50 : x
  2. Step 2: Convert to fraction form
    130.75/156.50 = 156.50/x
  3. Step 3: Cross multiply
    130.75x = 156.50 × 156.50
  4. Step 4: Simplify right side
    130.75x = 24,492.25
  5. Step 5: Solve for x
    x = 24,492.25/130.75
  6. Step 6: Final answer
    x = 187.32

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Why These Related Problems?

These problems maintain the same ratio (1.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.