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Finding the Fourth Proportional to 113.48, 156.50 and 92.72

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Solution

The fourth proportional to 113.48, 156.50 and 92.72 is: 127.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.48 : 156.50 = 92.72 : x
  2. Step 2: Convert to fraction form
    113.48/156.50 = 92.72/x
  3. Step 3: Cross multiply
    113.48x = 156.50 × 92.72
  4. Step 4: Simplify right side
    113.48x = 14,510.68
  5. Step 5: Solve for x
    x = 14,510.68/113.48
  6. Step 6: Final answer
    x = 127.87

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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.