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Finding the Fourth Proportional to 111,073.26, 153,121.65 and 79,186.80

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Solution

The fourth proportional to 111,073.26, 153,121.65 and 79,186.80 is: 109,164.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,073.26 : 153,121.65 = 79,186.80 : x
  2. Step 2: Convert to fraction form
    111,073.26/153,121.65 = 79,186.80/x
  3. Step 3: Cross multiply
    111,073.26x = 153,121.65 × 79,186.80
  4. Step 4: Simplify right side
    111,073.26x = 12,125,213,474.22
  5. Step 5: Solve for x
    x = 12,125,213,474.22/111,073.26
  6. Step 6: Final answer
    x = 109,164.11

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1.5x scale

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.