Home / 112,205.12-154,856.68-81,975.31

Finding the Fourth Proportional to 112,205.12, 154,856.68 and 81,975.31

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Solution

The fourth proportional to 112,205.12, 154,856.68 and 81,975.31 is: 113,135.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,205.12 : 154,856.68 = 81,975.31 : x
  2. Step 2: Convert to fraction form
    112,205.12/154,856.68 = 81,975.31/x
  3. Step 3: Cross multiply
    112,205.12x = 154,856.68 × 81,975.31
  4. Step 4: Simplify right side
    112,205.12x = 12,694,423,938.69
  5. Step 5: Solve for x
    x = 12,694,423,938.69/112,205.12
  6. Step 6: Final answer
    x = 113,135.87

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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.