Home / 131,166.40-196,799.28-78,613.60

Finding the Fourth Proportional to 131,166.40, 196,799.28 and 78,613.60

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Solution

The fourth proportional to 131,166.40, 196,799.28 and 78,613.60 is: 117,950.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,166.40 : 196,799.28 = 78,613.60 : x
  2. Step 2: Convert to fraction form
    131,166.40/196,799.28 = 78,613.60/x
  3. Step 3: Cross multiply
    131,166.40x = 196,799.28 × 78,613.60
  4. Step 4: Simplify right side
    131,166.40x = 15,471,099,878.21
  5. Step 5: Solve for x
    x = 15,471,099,878.21/131,166.40
  6. Step 6: Final answer
    x = 117,950.18

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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.