Home / 100,043.10-138,071.39-57,609.90

Finding the Fourth Proportional to 100,043.10, 138,071.39 and 57,609.90

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Solution

The fourth proportional to 100,043.10, 138,071.39 and 57,609.90 is: 79,508.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,043.10 : 138,071.39 = 57,609.90 : x
  2. Step 2: Convert to fraction form
    100,043.10/138,071.39 = 57,609.90/x
  3. Step 3: Cross multiply
    100,043.10x = 138,071.39 × 57,609.90
  4. Step 4: Simplify right side
    100,043.10x = 7,954,278,682.71
  5. Step 5: Solve for x
    x = 7,954,278,682.71/100,043.10
  6. Step 6: Final answer
    x = 79,508.52

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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.