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Finding the Fourth Proportional to 113.16, 156.08 and 79.94

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Solution

The fourth proportional to 113.16, 156.08 and 79.94 is: 110.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.16 : 156.08 = 79.94 : x
  2. Step 2: Convert to fraction form
    113.16/156.08 = 79.94/x
  3. Step 3: Cross multiply
    113.16x = 156.08 × 79.94
  4. Step 4: Simplify right side
    113.16x = 12,477.04
  5. Step 5: Solve for x
    x = 12,477.04/113.16
  6. Step 6: Final answer
    x = 110.26

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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.