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Finding the Fourth Proportional to 245,805.69, 339,244.19 and 138,396.66

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Solution

The fourth proportional to 245,805.69, 339,244.19 and 138,396.66 is: 191,005.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,805.69 : 339,244.19 = 138,396.66 : x
  2. Step 2: Convert to fraction form
    245,805.69/339,244.19 = 138,396.66/x
  3. Step 3: Cross multiply
    245,805.69x = 339,244.19 × 138,396.66
  4. Step 4: Simplify right side
    245,805.69x = 46,950,260,432.20
  5. Step 5: Solve for x
    x = 46,950,260,432.20/245,805.69
  6. Step 6: Final answer
    x = 191,005.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.