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Finding the Fourth Proportional to 109.09, 151.12 and 106.93

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Solution

The fourth proportional to 109.09, 151.12 and 106.93 is: 148.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.09 : 151.12 = 106.93 : x
  2. Step 2: Convert to fraction form
    109.09/151.12 = 106.93/x
  3. Step 3: Cross multiply
    109.09x = 151.12 × 106.93
  4. Step 4: Simplify right side
    109.09x = 16,159.26
  5. Step 5: Solve for x
    x = 16,159.26/109.09
  6. Step 6: Final answer
    x = 148.13

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.