Home / 100,040.28-138,053.61-54,718.11

Finding the Fourth Proportional to 100,040.28, 138,053.61 and 54,718.11

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Solution

The fourth proportional to 100,040.28, 138,053.61 and 54,718.11 is: 75,509.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,040.28 : 138,053.61 = 54,718.11 : x
  2. Step 2: Convert to fraction form
    100,040.28/138,053.61 = 54,718.11/x
  3. Step 3: Cross multiply
    100,040.28x = 138,053.61 × 54,718.11
  4. Step 4: Simplify right side
    100,040.28x = 7,554,032,617.88
  5. Step 5: Solve for x
    x = 7,554,032,617.88/100,040.28
  6. Step 6: Final answer
    x = 75,509.91

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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.