Home / 131,474.40-197,211.60-78,856.80

Finding the Fourth Proportional to 131,474.40, 197,211.60 and 78,856.80

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Solution

The fourth proportional to 131,474.40, 197,211.60 and 78,856.80 is: 118,285.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,474.40 : 197,211.60 = 78,856.80 : x
  2. Step 2: Convert to fraction form
    131,474.40/197,211.60 = 78,856.80/x
  3. Step 3: Cross multiply
    131,474.40x = 197,211.60 × 78,856.80
  4. Step 4: Simplify right side
    131,474.40x = 15,551,475,698.88
  5. Step 5: Solve for x
    x = 15,551,475,698.88/131,474.40
  6. Step 6: Final answer
    x = 118,285.20

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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.