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Finding the Fourth Proportional to 154,280.80, 212,910.24 and 87,212.80

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Solution

The fourth proportional to 154,280.80, 212,910.24 and 87,212.80 is: 120,355.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,280.80 : 212,910.24 = 87,212.80 : x
  2. Step 2: Convert to fraction form
    154,280.80/212,910.24 = 87,212.80/x
  3. Step 3: Cross multiply
    154,280.80x = 212,910.24 × 87,212.80
  4. Step 4: Simplify right side
    154,280.80x = 18,568,498,179.07
  5. Step 5: Solve for x
    x = 18,568,498,179.07/154,280.80
  6. Step 6: Final answer
    x = 120,355.21

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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.