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Finding the Fourth Proportional to 138,409.58, 191,005.22 and 74,747.38

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Solution

The fourth proportional to 138,409.58, 191,005.22 and 74,747.38 is: 103,151.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,409.58 : 191,005.22 = 74,747.38 : x
  2. Step 2: Convert to fraction form
    138,409.58/191,005.22 = 74,747.38/x
  3. Step 3: Cross multiply
    138,409.58x = 191,005.22 × 74,747.38
  4. Step 4: Simplify right side
    138,409.58x = 14,277,139,761.32
  5. Step 5: Solve for x
    x = 14,277,139,761.32/138,409.58
  6. Step 6: Final answer
    x = 103,151.38

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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.