Home / 138,454.40-191,067.82-78,025.98

Finding the Fourth Proportional to 138,454.40, 191,067.82 and 78,025.98

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Solution

The fourth proportional to 138,454.40, 191,067.82 and 78,025.98 is: 107,676.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,454.40 : 191,067.82 = 78,025.98 : x
  2. Step 2: Convert to fraction form
    138,454.40/191,067.82 = 78,025.98/x
  3. Step 3: Cross multiply
    138,454.40x = 191,067.82 × 78,025.98
  4. Step 4: Simplify right side
    138,454.40x = 14,908,253,901.96
  5. Step 5: Solve for x
    x = 14,908,253,901.96/138,454.40
  6. Step 6: Final answer
    x = 107,676.27

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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.