Home / 138,660.64-191,351.69-74,998.43

Finding the Fourth Proportional to 138,660.64, 191,351.69 and 74,998.43

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Solution

The fourth proportional to 138,660.64, 191,351.69 and 74,998.43 is: 103,497.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,660.64 : 191,351.69 = 74,998.43 : x
  2. Step 2: Convert to fraction form
    138,660.64/191,351.69 = 74,998.43/x
  3. Step 3: Cross multiply
    138,660.64x = 191,351.69 × 74,998.43
  4. Step 4: Simplify right side
    138,660.64x = 14,351,076,327.85
  5. Step 5: Solve for x
    x = 14,351,076,327.85/138,660.64
  6. Step 6: Final answer
    x = 103,497.84

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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.