Home / 100,515.71-138,571.55-82,302.86

Finding the Fourth Proportional to 100,515.71, 138,571.55 and 82,302.86

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Solution

The fourth proportional to 100,515.71, 138,571.55 and 82,302.86 is: 113,463.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,515.71 : 138,571.55 = 82,302.86 : x
  2. Step 2: Convert to fraction form
    100,515.71/138,571.55 = 82,302.86/x
  3. Step 3: Cross multiply
    100,515.71x = 138,571.55 × 82,302.86
  4. Step 4: Simplify right side
    100,515.71x = 11,404,833,775.26
  5. Step 5: Solve for x
    x = 11,404,833,775.26/100,515.71
  6. Step 6: Final answer
    x = 113,463.20

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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.