Home / 90,389.90-135,451.14-85,334.96

Finding the Fourth Proportional to 90,389.90, 135,451.14 and 85,334.96

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Solution

The fourth proportional to 90,389.90, 135,451.14 and 85,334.96 is: 127,876.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,389.90 : 135,451.14 = 85,334.96 : x
  2. Step 2: Convert to fraction form
    90,389.90/135,451.14 = 85,334.96/x
  3. Step 3: Cross multiply
    90,389.90x = 135,451.14 × 85,334.96
  4. Step 4: Simplify right side
    90,389.90x = 11,558,716,936.60
  5. Step 5: Solve for x
    x = 11,558,716,936.60/90,389.90
  6. Step 6: Final answer
    x = 127,876.21

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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.