Home / 100,109.65-138,137.68-59,814.90

Finding the Fourth Proportional to 100,109.65, 138,137.68 and 59,814.90

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Solution

The fourth proportional to 100,109.65, 138,137.68 and 59,814.90 is: 82,536.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,109.65 : 138,137.68 = 59,814.90 : x
  2. Step 2: Convert to fraction form
    100,109.65/138,137.68 = 59,814.90/x
  3. Step 3: Cross multiply
    100,109.65x = 138,137.68 × 59,814.90
  4. Step 4: Simplify right side
    100,109.65x = 8,262,691,515.43
  5. Step 5: Solve for x
    x = 8,262,691,515.43/100,109.65
  6. Step 6: Final answer
    x = 82,536.41

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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.