Home / 135,651.72-187,195.92-75,221.40

Finding the Fourth Proportional to 135,651.72, 187,195.92 and 75,221.40

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Solution

The fourth proportional to 135,651.72, 187,195.92 and 75,221.40 is: 103,803.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,651.72 : 187,195.92 = 75,221.40 : x
  2. Step 2: Convert to fraction form
    135,651.72/187,195.92 = 75,221.40/x
  3. Step 3: Cross multiply
    135,651.72x = 187,195.92 × 75,221.40
  4. Step 4: Simplify right side
    135,651.72x = 14,081,139,176.69
  5. Step 5: Solve for x
    x = 14,081,139,176.69/135,651.72
  6. Step 6: Final answer
    x = 103,803.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.