Home / 208,131.69-312,006.17-74,979.39

Finding the Fourth Proportional to 208,131.69, 312,006.17 and 74,979.39

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Solution

The fourth proportional to 208,131.69, 312,006.17 and 74,979.39 is: 112,400.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,131.69 : 312,006.17 = 74,979.39 : x
  2. Step 2: Convert to fraction form
    208,131.69/312,006.17 = 74,979.39/x
  3. Step 3: Cross multiply
    208,131.69x = 312,006.17 × 74,979.39
  4. Step 4: Simplify right side
    208,131.69x = 23,394,032,302.84
  5. Step 5: Solve for x
    x = 23,394,032,302.84/208,131.69
  6. Step 6: Final answer
    x = 112,400.15

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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.