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Finding the Fourth Proportional to 111,079.26, 153,129.93 and 79,192.80

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Solution

The fourth proportional to 111,079.26, 153,129.93 and 79,192.80 is: 109,172.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,079.26 : 153,129.93 = 79,192.80 : x
  2. Step 2: Convert to fraction form
    111,079.26/153,129.93 = 79,192.80/x
  3. Step 3: Cross multiply
    111,079.26x = 153,129.93 × 79,192.80
  4. Step 4: Simplify right side
    111,079.26x = 12,126,787,920.50
  5. Step 5: Solve for x
    x = 12,126,787,920.50/111,079.26
  6. Step 6: Final answer
    x = 109,172.39

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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.