Home / 131,663.20-197,494.80-78,519.10

Finding the Fourth Proportional to 131,663.20, 197,494.80 and 78,519.10

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Solution

The fourth proportional to 131,663.20, 197,494.80 and 78,519.10 is: 117,778.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,663.20 : 197,494.80 = 78,519.10 : x
  2. Step 2: Convert to fraction form
    131,663.20/197,494.80 = 78,519.10/x
  3. Step 3: Cross multiply
    131,663.20x = 197,494.80 × 78,519.10
  4. Step 4: Simplify right side
    131,663.20x = 15,507,113,950.68
  5. Step 5: Solve for x
    x = 15,507,113,950.68/131,663.20
  6. Step 6: Final answer
    x = 117,778.65

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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.