Home / 87,603.40-131,405.10-80,345.80

Finding the Fourth Proportional to 87,603.40, 131,405.10 and 80,345.80

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Solution

The fourth proportional to 87,603.40, 131,405.10 and 80,345.80 is: 120,518.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,603.40 : 131,405.10 = 80,345.80 : x
  2. Step 2: Convert to fraction form
    87,603.40/131,405.10 = 80,345.80/x
  3. Step 3: Cross multiply
    87,603.40x = 131,405.10 × 80,345.80
  4. Step 4: Simplify right side
    87,603.40x = 10,557,847,883.58
  5. Step 5: Solve for x
    x = 10,557,847,883.58/87,603.40
  6. Step 6: Final answer
    x = 120,518.70

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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.