Home / 138,936.72-191,733.40-75,274.64

Finding the Fourth Proportional to 138,936.72, 191,733.40 and 75,274.64

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Solution

The fourth proportional to 138,936.72, 191,733.40 and 75,274.64 is: 103,879.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,936.72 : 191,733.40 = 75,274.64 : x
  2. Step 2: Convert to fraction form
    138,936.72/191,733.40 = 75,274.64/x
  3. Step 3: Cross multiply
    138,936.72x = 191,733.40 × 75,274.64
  4. Step 4: Simplify right side
    138,936.72x = 14,432,662,660.98
  5. Step 5: Solve for x
    x = 14,432,662,660.98/138,936.72
  6. Step 6: Final answer
    x = 103,879.40

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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.