Home / 91,591.14-138,010.86-75,315.78

Finding the Fourth Proportional to 91,591.14, 138,010.86 and 75,315.78

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Solution

The fourth proportional to 91,591.14, 138,010.86 and 75,315.78 is: 113,486.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,591.14 : 138,010.86 = 75,315.78 : x
  2. Step 2: Convert to fraction form
    91,591.14/138,010.86 = 75,315.78/x
  3. Step 3: Cross multiply
    91,591.14x = 138,010.86 × 75,315.78
  4. Step 4: Simplify right side
    91,591.14x = 10,394,395,569.37
  5. Step 5: Solve for x
    x = 10,394,395,569.37/91,591.14
  6. Step 6: Final answer
    x = 113,486.91

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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.