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Finding the Fourth Proportional to 138,414.48, 191,011.94 and 74,752.29

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Solution

The fourth proportional to 138,414.48, 191,011.94 and 74,752.29 is: 103,158.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,414.48 : 191,011.94 = 74,752.29 : x
  2. Step 2: Convert to fraction form
    138,414.48/191,011.94 = 74,752.29/x
  3. Step 3: Cross multiply
    138,414.48x = 191,011.94 × 74,752.29
  4. Step 4: Simplify right side
    138,414.48x = 14,278,579,558.58
  5. Step 5: Solve for x
    x = 14,278,579,558.58/138,414.48
  6. Step 6: Final answer
    x = 103,158.13

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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.