Home / 65,811.51-90,819.78-37,131.13

Finding the Fourth Proportional to 65,811.51, 90,819.78 and 37,131.13

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Solution

The fourth proportional to 65,811.51, 90,819.78 and 37,131.13 is: 51,240.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,811.51 : 90,819.78 = 37,131.13 : x
  2. Step 2: Convert to fraction form
    65,811.51/90,819.78 = 37,131.13/x
  3. Step 3: Cross multiply
    65,811.51x = 90,819.78 × 37,131.13
  4. Step 4: Simplify right side
    65,811.51x = 3,372,241,057.75
  5. Step 5: Solve for x
    x = 3,372,241,057.75/65,811.51
  6. Step 6: Final answer
    x = 51,240.90

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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.