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Finding the Fourth Proportional to 104.99, 156.47 and 104.13

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Solution

The fourth proportional to 104.99, 156.47 and 104.13 is: 155.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.99 : 156.47 = 104.13 : x
  2. Step 2: Convert to fraction form
    104.99/156.47 = 104.13/x
  3. Step 3: Cross multiply
    104.99x = 156.47 × 104.13
  4. Step 4: Simplify right side
    104.99x = 16,292.70
  5. Step 5: Solve for x
    x = 16,292.70/104.99
  6. Step 6: Final answer
    x = 155.19

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.