Home / 138,817.05-208,103.94-66,733.95

Finding the Fourth Proportional to 138,817.05, 208,103.94 and 66,733.95

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Solution

The fourth proportional to 138,817.05, 208,103.94 and 66,733.95 is: 100,042.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,817.05 : 208,103.94 = 66,733.95 : x
  2. Step 2: Convert to fraction form
    138,817.05/208,103.94 = 66,733.95/x
  3. Step 3: Cross multiply
    138,817.05x = 208,103.94 × 66,733.95
  4. Step 4: Simplify right side
    138,817.05x = 13,887,597,926.76
  5. Step 5: Solve for x
    x = 13,887,597,926.76/138,817.05
  6. Step 6: Final answer
    x = 100,042.45

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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.