Home / 87,331.50-120,511.80-51,513.30

Finding the Fourth Proportional to 87,331.50, 120,511.80 and 51,513.30

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Solution

The fourth proportional to 87,331.50, 120,511.80 and 51,513.30 is: 71,085.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,331.50 : 120,511.80 = 51,513.30 : x
  2. Step 2: Convert to fraction form
    87,331.50/120,511.80 = 51,513.30/x
  3. Step 3: Cross multiply
    87,331.50x = 120,511.80 × 51,513.30
  4. Step 4: Simplify right side
    87,331.50x = 6,207,960,506.94
  5. Step 5: Solve for x
    x = 6,207,960,506.94/87,331.50
  6. Step 6: Final answer
    x = 71,085.01

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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.