Home / 131,637.20-197,455.80-78,493.10

Finding the Fourth Proportional to 131,637.20, 197,455.80 and 78,493.10

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Solution

The fourth proportional to 131,637.20, 197,455.80 and 78,493.10 is: 117,739.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,637.20 : 197,455.80 = 78,493.10 : x
  2. Step 2: Convert to fraction form
    131,637.20/197,455.80 = 78,493.10/x
  3. Step 3: Cross multiply
    131,637.20x = 197,455.80 × 78,493.10
  4. Step 4: Simplify right side
    131,637.20x = 15,498,917,854.98
  5. Step 5: Solve for x
    x = 15,498,917,854.98/131,637.20
  6. Step 6: Final answer
    x = 117,739.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.