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Finding the Fourth Proportional to 138,978.41, 208,306.55 and 63,941.09

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Solution

The fourth proportional to 138,978.41, 208,306.55 and 63,941.09 is: 95,837.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,978.41 : 208,306.55 = 63,941.09 : x
  2. Step 2: Convert to fraction form
    138,978.41/208,306.55 = 63,941.09/x
  3. Step 3: Cross multiply
    138,978.41x = 208,306.55 × 63,941.09
  4. Step 4: Simplify right side
    138,978.41x = 13,319,346,979.46
  5. Step 5: Solve for x
    x = 13,319,346,979.46/138,978.41
  6. Step 6: Final answer
    x = 95,837.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.