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Finding the Fourth Proportional to 138,947.03, 208,699.54 and 82,896.65

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Solution

The fourth proportional to 138,947.03, 208,699.54 and 82,896.65 is: 124,511.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,947.03 : 208,699.54 = 82,896.65 : x
  2. Step 2: Convert to fraction form
    138,947.03/208,699.54 = 82,896.65/x
  3. Step 3: Cross multiply
    138,947.03x = 208,699.54 × 82,896.65
  4. Step 4: Simplify right side
    138,947.03x = 17,300,492,254.43
  5. Step 5: Solve for x
    x = 17,300,492,254.43/138,947.03
  6. Step 6: Final answer
    x = 124,511.42

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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.