Home / 87,219.40-130,829.10-86,297.80

Finding the Fourth Proportional to 87,219.40, 130,829.10 and 86,297.80

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Solution

The fourth proportional to 87,219.40, 130,829.10 and 86,297.80 is: 129,446.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,219.40 : 130,829.10 = 86,297.80 : x
  2. Step 2: Convert to fraction form
    87,219.40/130,829.10 = 86,297.80/x
  3. Step 3: Cross multiply
    87,219.40x = 130,829.10 × 86,297.80
  4. Step 4: Simplify right side
    87,219.40x = 11,290,263,505.98
  5. Step 5: Solve for x
    x = 11,290,263,505.98/87,219.40
  6. Step 6: Final answer
    x = 129,446.70

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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.