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Finding the Fourth Proportional to 138,437.91, 191,044.44 and 74,775.71

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Solution

The fourth proportional to 138,437.91, 191,044.44 and 74,775.71 is: 103,190.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,437.91 : 191,044.44 = 74,775.71 : x
  2. Step 2: Convert to fraction form
    138,437.91/191,044.44 = 74,775.71/x
  3. Step 3: Cross multiply
    138,437.91x = 191,044.44 × 74,775.71
  4. Step 4: Simplify right side
    138,437.91x = 14,285,483,045.54
  5. Step 5: Solve for x
    x = 14,285,483,045.54/138,437.91
  6. Step 6: Final answer
    x = 103,190.54

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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.