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Finding the Fourth Proportional to 111,099.52, 153,157.84 and 79,213.06

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Solution

The fourth proportional to 111,099.52, 153,157.84 and 79,213.06 is: 109,200.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,099.52 : 153,157.84 = 79,213.06 : x
  2. Step 2: Convert to fraction form
    111,099.52/153,157.84 = 79,213.06/x
  3. Step 3: Cross multiply
    111,099.52x = 153,157.84 × 79,213.06
  4. Step 4: Simplify right side
    111,099.52x = 12,132,101,169.39
  5. Step 5: Solve for x
    x = 12,132,101,169.39/111,099.52
  6. Step 6: Final answer
    x = 109,200.30

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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.