Home / 90,628.83-135,868.38-39,991.80

Finding the Fourth Proportional to 90,628.83, 135,868.38 and 39,991.80

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Solution

The fourth proportional to 90,628.83, 135,868.38 and 39,991.80 is: 59,954.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,628.83 : 135,868.38 = 39,991.80 : x
  2. Step 2: Convert to fraction form
    90,628.83/135,868.38 = 39,991.80/x
  3. Step 3: Cross multiply
    90,628.83x = 135,868.38 × 39,991.80
  4. Step 4: Simplify right side
    90,628.83x = 5,433,621,079.28
  5. Step 5: Solve for x
    x = 5,433,621,079.28/90,628.83
  6. Step 6: Final answer
    x = 59,954.66

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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.