Home / 87,920.84-131,880.81-31,760.90

Finding the Fourth Proportional to 87,920.84, 131,880.81 and 31,760.90

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Solution

The fourth proportional to 87,920.84, 131,880.81 and 31,760.90 is: 47,641.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,920.84 : 131,880.81 = 31,760.90 : x
  2. Step 2: Convert to fraction form
    87,920.84/131,880.81 = 31,760.90/x
  3. Step 3: Cross multiply
    87,920.84x = 131,880.81 × 31,760.90
  4. Step 4: Simplify right side
    87,920.84x = 4,188,653,667.13
  5. Step 5: Solve for x
    x = 4,188,653,667.13/87,920.84
  6. Step 6: Final answer
    x = 47,641.20

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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.