Home / 131,619.60-197,170.20-78,872.40

Finding the Fourth Proportional to 131,619.60, 197,170.20 and 78,872.40

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Solution

The fourth proportional to 131,619.60, 197,170.20 and 78,872.40 is: 118,153.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,619.60 : 197,170.20 = 78,872.40 : x
  2. Step 2: Convert to fraction form
    131,619.60/197,170.20 = 78,872.40/x
  3. Step 3: Cross multiply
    131,619.60x = 197,170.20 × 78,872.40
  4. Step 4: Simplify right side
    131,619.60x = 15,551,286,882.48
  5. Step 5: Solve for x
    x = 15,551,286,882.48/131,619.60
  6. Step 6: Final answer
    x = 118,153.28

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1.5x scale

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.