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Finding the Fourth Proportional to 106.94, 147.48 and 70.09

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Solution

The fourth proportional to 106.94, 147.48 and 70.09 is: 96.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.94 : 147.48 = 70.09 : x
  2. Step 2: Convert to fraction form
    106.94/147.48 = 70.09/x
  3. Step 3: Cross multiply
    106.94x = 147.48 × 70.09
  4. Step 4: Simplify right side
    106.94x = 10,336.14
  5. Step 5: Solve for x
    x = 10,336.14/106.94
  6. Step 6: Final answer
    x = 96.65

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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.