Home / 87,128.20-130,692.30-83,847.70

Finding the Fourth Proportional to 87,128.20, 130,692.30 and 83,847.70

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Solution

The fourth proportional to 87,128.20, 130,692.30 and 83,847.70 is: 125,771.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,128.20 : 130,692.30 = 83,847.70 : x
  2. Step 2: Convert to fraction form
    87,128.20/130,692.30 = 83,847.70/x
  3. Step 3: Cross multiply
    87,128.20x = 130,692.30 × 83,847.70
  4. Step 4: Simplify right side
    87,128.20x = 10,958,248,762.71
  5. Step 5: Solve for x
    x = 10,958,248,762.71/87,128.20
  6. Step 6: Final answer
    x = 125,771.55

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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.