Home / 213,515.84-320,387.97-138,618.38

Finding the Fourth Proportional to 213,515.84, 320,387.97 and 138,618.38

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Solution

The fourth proportional to 213,515.84, 320,387.97 and 138,618.38 is: 208,001.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,515.84 : 320,387.97 = 138,618.38 : x
  2. Step 2: Convert to fraction form
    213,515.84/320,387.97 = 138,618.38/x
  3. Step 3: Cross multiply
    213,515.84x = 320,387.97 × 138,618.38
  4. Step 4: Simplify right side
    213,515.84x = 44,411,661,372.89
  5. Step 5: Solve for x
    x = 44,411,661,372.89/213,515.84
  6. Step 6: Final answer
    x = 208,001.72

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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.