Home / 100,040.21-138,059.92-57,612.41

Finding the Fourth Proportional to 100,040.21, 138,059.92 and 57,612.41

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Solution

The fourth proportional to 100,040.21, 138,059.92 and 57,612.41 is: 79,507.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,040.21 : 138,059.92 = 57,612.41 : x
  2. Step 2: Convert to fraction form
    100,040.21/138,059.92 = 57,612.41/x
  3. Step 3: Cross multiply
    100,040.21x = 138,059.92 × 57,612.41
  4. Step 4: Simplify right side
    100,040.21x = 7,953,965,229.60
  5. Step 5: Solve for x
    x = 7,953,965,229.60/100,040.21
  6. Step 6: Final answer
    x = 79,507.68

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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.