Home / 131,439.60-197,159.40-99,946.80

Finding the Fourth Proportional to 131,439.60, 197,159.40 and 99,946.80

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Solution

The fourth proportional to 131,439.60, 197,159.40 and 99,946.80 is: 149,920.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,439.60 : 197,159.40 = 99,946.80 : x
  2. Step 2: Convert to fraction form
    131,439.60/197,159.40 = 99,946.80/x
  3. Step 3: Cross multiply
    131,439.60x = 197,159.40 × 99,946.80
  4. Step 4: Simplify right side
    131,439.60x = 19,705,451,119.92
  5. Step 5: Solve for x
    x = 19,705,451,119.92/131,439.60
  6. Step 6: Final answer
    x = 149,920.20

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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.