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Finding the Fourth Proportional to 107.01, 147.78 and 79.43

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Solution

The fourth proportional to 107.01, 147.78 and 79.43 is: 109.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.01 : 147.78 = 79.43 : x
  2. Step 2: Convert to fraction form
    107.01/147.78 = 79.43/x
  3. Step 3: Cross multiply
    107.01x = 147.78 × 79.43
  4. Step 4: Simplify right side
    107.01x = 11,737.43
  5. Step 5: Solve for x
    x = 11,737.43/107.01
  6. Step 6: Final answer
    x = 109.69

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.