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Finding the Fourth Proportional to 138,908.52, 191,693.54 and 75,246.56

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Solution

The fourth proportional to 138,908.52, 191,693.54 and 75,246.56 is: 103,840.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,908.52 : 191,693.54 = 75,246.56 : x
  2. Step 2: Convert to fraction form
    138,908.52/191,693.54 = 75,246.56/x
  3. Step 3: Cross multiply
    138,908.52x = 191,693.54 × 75,246.56
  4. Step 4: Simplify right side
    138,908.52x = 14,424,279,459.22
  5. Step 5: Solve for x
    x = 14,424,279,459.22/138,908.52
  6. Step 6: Final answer
    x = 103,840.13

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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.