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Finding the Fourth Proportional to 113.23, 156.22 and 68.93

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Solution

The fourth proportional to 113.23, 156.22 and 68.93 is: 95.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.23 : 156.22 = 68.93 : x
  2. Step 2: Convert to fraction form
    113.23/156.22 = 68.93/x
  3. Step 3: Cross multiply
    113.23x = 156.22 × 68.93
  4. Step 4: Simplify right side
    113.23x = 10,768.24
  5. Step 5: Solve for x
    x = 10,768.24/113.23
  6. Step 6: Final answer
    x = 95.10

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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.