Home / 138,890.53-208,240.98-66,805.39

Finding the Fourth Proportional to 138,890.53, 208,240.98 and 66,805.39

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Solution

The fourth proportional to 138,890.53, 208,240.98 and 66,805.39 is: 100,162.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,890.53 : 208,240.98 = 66,805.39 : x
  2. Step 2: Convert to fraction form
    138,890.53/208,240.98 = 66,805.39/x
  3. Step 3: Cross multiply
    138,890.53x = 208,240.98 × 66,805.39
  4. Step 4: Simplify right side
    138,890.53x = 13,911,619,882.88
  5. Step 5: Solve for x
    x = 13,911,619,882.88/138,890.53
  6. Step 6: Final answer
    x = 100,162.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.