Home / 245,728.31-339,115.98-138,305.30

Finding the Fourth Proportional to 245,728.31, 339,115.98 and 138,305.30

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Solution

The fourth proportional to 245,728.31, 339,115.98 and 138,305.30 is: 190,867.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,728.31 : 339,115.98 = 138,305.30 : x
  2. Step 2: Convert to fraction form
    245,728.31/339,115.98 = 138,305.30/x
  3. Step 3: Cross multiply
    245,728.31x = 339,115.98 × 138,305.30
  4. Step 4: Simplify right side
    245,728.31x = 46,901,535,653.11
  5. Step 5: Solve for x
    x = 46,901,535,653.11/245,728.31
  6. Step 6: Final answer
    x = 190,867.45

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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.