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Finding the Fourth Proportional to 138,596.58, 191,263.56 and 74,934.38

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Solution

The fourth proportional to 138,596.58, 191,263.56 and 74,934.38 is: 103,409.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,596.58 : 191,263.56 = 74,934.38 : x
  2. Step 2: Convert to fraction form
    138,596.58/191,263.56 = 74,934.38/x
  3. Step 3: Cross multiply
    138,596.58x = 191,263.56 × 74,934.38
  4. Step 4: Simplify right side
    138,596.58x = 14,332,215,193.28
  5. Step 5: Solve for x
    x = 14,332,215,193.28/138,596.58
  6. Step 6: Final answer
    x = 103,409.59

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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.