Home / 87,531.40-131,210.70-43,121.80

Finding the Fourth Proportional to 87,531.40, 131,210.70 and 43,121.80

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Solution

The fourth proportional to 87,531.40, 131,210.70 and 43,121.80 is: 64,640.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,531.40 : 131,210.70 = 43,121.80 : x
  2. Step 2: Convert to fraction form
    87,531.40/131,210.70 = 43,121.80/x
  3. Step 3: Cross multiply
    87,531.40x = 131,210.70 × 43,121.80
  4. Step 4: Simplify right side
    87,531.40x = 5,658,041,563.26
  5. Step 5: Solve for x
    x = 5,658,041,563.26/87,531.40
  6. Step 6: Final answer
    x = 64,640.14

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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.