Home / 210,155.35-315,209.66-75,213.97

Finding the Fourth Proportional to 210,155.35, 315,209.66 and 75,213.97

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Solution

The fourth proportional to 210,155.35, 315,209.66 and 75,213.97 is: 112,812.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,155.35 : 315,209.66 = 75,213.97 : x
  2. Step 2: Convert to fraction form
    210,155.35/315,209.66 = 75,213.97/x
  3. Step 3: Cross multiply
    210,155.35x = 315,209.66 × 75,213.97
  4. Step 4: Simplify right side
    210,155.35x = 23,708,169,169.93
  5. Step 5: Solve for x
    x = 23,708,169,169.93/210,155.35
  6. Step 6: Final answer
    x = 112,812.59

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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.