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Finding the Fourth Proportional to 112,099.80, 168,149.70 and 109,507.80

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Solution

The fourth proportional to 112,099.80, 168,149.70 and 109,507.80 is: 164,261.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,099.80 : 168,149.70 = 109,507.80 : x
  2. Step 2: Convert to fraction form
    112,099.80/168,149.70 = 109,507.80/x
  3. Step 3: Cross multiply
    112,099.80x = 168,149.70 × 109,507.80
  4. Step 4: Simplify right side
    112,099.80x = 18,413,703,717.66
  5. Step 5: Solve for x
    x = 18,413,703,717.66/112,099.80
  6. Step 6: Final answer
    x = 164,261.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.