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Finding the Fourth Proportional to 113.75, 156.99 and 75.02

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Solution

The fourth proportional to 113.75, 156.99 and 75.02 is: 103.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.75 : 156.99 = 75.02 : x
  2. Step 2: Convert to fraction form
    113.75/156.99 = 75.02/x
  3. Step 3: Cross multiply
    113.75x = 156.99 × 75.02
  4. Step 4: Simplify right side
    113.75x = 11,777.39
  5. Step 5: Solve for x
    x = 11,777.39/113.75
  6. Step 6: Final answer
    x = 103.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.