Home / 100,331.91-138,423.67-57,280.41

Finding the Fourth Proportional to 100,331.91, 138,423.67 and 57,280.41

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Solution

The fourth proportional to 100,331.91, 138,423.67 and 57,280.41 is: 79,027.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,331.91 : 138,423.67 = 57,280.41 : x
  2. Step 2: Convert to fraction form
    100,331.91/138,423.67 = 57,280.41/x
  3. Step 3: Cross multiply
    100,331.91x = 138,423.67 × 57,280.41
  4. Step 4: Simplify right side
    100,331.91x = 7,928,964,428.10
  5. Step 5: Solve for x
    x = 7,928,964,428.10/100,331.91
  6. Step 6: Final answer
    x = 79,027.34

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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.