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Finding the Fourth Proportional to 245,538.34, 338,839.50 and 138,108.44

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Solution

The fourth proportional to 245,538.34, 338,839.50 and 138,108.44 is: 190,587.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,538.34 : 338,839.50 = 138,108.44 : x
  2. Step 2: Convert to fraction form
    245,538.34/338,839.50 = 138,108.44/x
  3. Step 3: Cross multiply
    245,538.34x = 338,839.50 × 138,108.44
  4. Step 4: Simplify right side
    245,538.34x = 46,796,596,120.39
  5. Step 5: Solve for x
    x = 46,796,596,120.39/245,538.34
  6. Step 6: Final answer
    x = 190,587.74

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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.