Home / 87,637.40-131,456.10-80,379.80

Finding the Fourth Proportional to 87,637.40, 131,456.10 and 80,379.80

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Solution

The fourth proportional to 87,637.40, 131,456.10 and 80,379.80 is: 120,569.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,637.40 : 131,456.10 = 80,379.80 : x
  2. Step 2: Convert to fraction form
    87,637.40/131,456.10 = 80,379.80/x
  3. Step 3: Cross multiply
    87,637.40x = 131,456.10 × 80,379.80
  4. Step 4: Simplify right side
    87,637.40x = 10,566,415,026.78
  5. Step 5: Solve for x
    x = 10,566,415,026.78/87,637.40
  6. Step 6: Final answer
    x = 120,569.70

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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.