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Finding the Fourth Proportional to 245,885.33, 339,320.25 and 138,489.98

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Solution

The fourth proportional to 245,885.33, 339,320.25 and 138,489.98 is: 191,115.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,885.33 : 339,320.25 = 138,489.98 : x
  2. Step 2: Convert to fraction form
    245,885.33/339,320.25 = 138,489.98/x
  3. Step 3: Cross multiply
    245,885.33x = 339,320.25 × 138,489.98
  4. Step 4: Simplify right side
    245,885.33x = 46,992,452,939.49
  5. Step 5: Solve for x
    x = 46,992,452,939.49/245,885.33
  6. Step 6: Final answer
    x = 191,115.32

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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.