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Finding the Fourth Proportional to 149,374.68, 206,134.64 and 81,392.56

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Solution

The fourth proportional to 149,374.68, 206,134.64 and 81,392.56 is: 112,320.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,374.68 : 206,134.64 = 81,392.56 : x
  2. Step 2: Convert to fraction form
    149,374.68/206,134.64 = 81,392.56/x
  3. Step 3: Cross multiply
    149,374.68x = 206,134.64 × 81,392.56
  4. Step 4: Simplify right side
    149,374.68x = 16,777,826,054.28
  5. Step 5: Solve for x
    x = 16,777,826,054.28/149,374.68
  6. Step 6: Final answer
    x = 112,320.42

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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.