Home / 131,421.60-196,873.20-78,674.40

Finding the Fourth Proportional to 131,421.60, 196,873.20 and 78,674.40

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Solution

The fourth proportional to 131,421.60, 196,873.20 and 78,674.40 is: 117,856.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,421.60 : 196,873.20 = 78,674.40 : x
  2. Step 2: Convert to fraction form
    131,421.60/196,873.20 = 78,674.40/x
  3. Step 3: Cross multiply
    131,421.60x = 196,873.20 × 78,674.40
  4. Step 4: Simplify right side
    131,421.60x = 15,488,880,886.08
  5. Step 5: Solve for x
    x = 15,488,880,886.08/131,421.60
  6. Step 6: Final answer
    x = 117,856.43

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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.