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Finding the Fourth Proportional to 112,170, 154,794.60 and 61,872.24

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Solution

The fourth proportional to 112,170, 154,794.60 and 61,872.24 is: 85,383.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,170 : 154,794.60 = 61,872.24 : x
  2. Step 2: Convert to fraction form
    112,170/154,794.60 = 61,872.24/x
  3. Step 3: Cross multiply
    112,170x = 154,794.60 × 61,872.24
  4. Step 4: Simplify right side
    112,170x = 9,577,488,641.90
  5. Step 5: Solve for x
    x = 9,577,488,641.90/112,170
  6. Step 6: Final answer
    x = 85,383.69

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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.