Home / 90,857.20-135,353.41-86,758.50

Finding the Fourth Proportional to 90,857.20, 135,353.41 and 86,758.50

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Solution

The fourth proportional to 90,857.20, 135,353.41 and 86,758.50 is: 129,247.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,857.20 : 135,353.41 = 86,758.50 : x
  2. Step 2: Convert to fraction form
    90,857.20/135,353.41 = 86,758.50/x
  3. Step 3: Cross multiply
    90,857.20x = 135,353.41 × 86,758.50
  4. Step 4: Simplify right side
    90,857.20x = 11,743,058,821.49
  5. Step 5: Solve for x
    x = 11,743,058,821.49/90,857.20
  6. Step 6: Final answer
    x = 129,247.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.