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Finding the Fourth Proportional to 138,642.74, 191,280.44 and 113,104.95

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Solution

The fourth proportional to 138,642.74, 191,280.44 and 113,104.95 is: 156,046.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,642.74 : 191,280.44 = 113,104.95 : x
  2. Step 2: Convert to fraction form
    138,642.74/191,280.44 = 113,104.95/x
  3. Step 3: Cross multiply
    138,642.74x = 191,280.44 × 113,104.95
  4. Step 4: Simplify right side
    138,642.74x = 21,634,764,036.65
  5. Step 5: Solve for x
    x = 21,634,764,036.65/138,642.74
  6. Step 6: Final answer
    x = 156,046.86

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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.