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Finding the Fourth Proportional to 246,395.78, 340,026.12 and 138,965.58

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Solution

The fourth proportional to 246,395.78, 340,026.12 and 138,965.58 is: 191,772.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    246,395.78 : 340,026.12 = 138,965.58 : x
  2. Step 2: Convert to fraction form
    246,395.78/340,026.12 = 138,965.58/x
  3. Step 3: Cross multiply
    246,395.78x = 340,026.12 × 138,965.58
  4. Step 4: Simplify right side
    246,395.78x = 47,251,926,980.95
  5. Step 5: Solve for x
    x = 47,251,926,980.95/246,395.78
  6. Step 6: Final answer
    x = 191,772.47

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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.