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Finding the Fourth Proportional to 104.79, 155.92 and 99.03

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Solution

The fourth proportional to 104.79, 155.92 and 99.03 is: 147.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.79 : 155.92 = 99.03 : x
  2. Step 2: Convert to fraction form
    104.79/155.92 = 99.03/x
  3. Step 3: Cross multiply
    104.79x = 155.92 × 99.03
  4. Step 4: Simplify right side
    104.79x = 15,440.51
  5. Step 5: Solve for x
    x = 15,440.51/104.79
  6. Step 6: Final answer
    x = 147.35

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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.