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Finding the Fourth Proportional to 245,803.52, 339,215.31 and 138,377.48

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Solution

The fourth proportional to 245,803.52, 339,215.31 and 138,377.48 is: 190,964.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,803.52 : 339,215.31 = 138,377.48 : x
  2. Step 2: Convert to fraction form
    245,803.52/339,215.31 = 138,377.48/x
  3. Step 3: Cross multiply
    245,803.52x = 339,215.31 × 138,377.48
  4. Step 4: Simplify right side
    245,803.52x = 46,939,758,079.14
  5. Step 5: Solve for x
    x = 46,939,758,079.14/245,803.52
  6. Step 6: Final answer
    x = 190,964.55

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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.