Home / 91,610.10-138,039.21-75,334.71

Finding the Fourth Proportional to 91,610.10, 138,039.21 and 75,334.71

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Solution

The fourth proportional to 91,610.10, 138,039.21 and 75,334.71 is: 113,515.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,610.10 : 138,039.21 = 75,334.71 : x
  2. Step 2: Convert to fraction form
    91,610.10/138,039.21 = 75,334.71/x
  3. Step 3: Cross multiply
    91,610.10x = 138,039.21 × 75,334.71
  4. Step 4: Simplify right side
    91,610.10x = 10,399,143,853.98
  5. Step 5: Solve for x
    x = 10,399,143,853.98/91,610.10
  6. Step 6: Final answer
    x = 113,515.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.