Home / 131,165.40-196,797.78-78,612.60

Finding the Fourth Proportional to 131,165.40, 196,797.78 and 78,612.60

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Solution

The fourth proportional to 131,165.40, 196,797.78 and 78,612.60 is: 117,948.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,165.40 : 196,797.78 = 78,612.60 : x
  2. Step 2: Convert to fraction form
    131,165.40/196,797.78 = 78,612.60/x
  3. Step 3: Cross multiply
    131,165.40x = 196,797.78 × 78,612.60
  4. Step 4: Simplify right side
    131,165.40x = 15,470,785,160.03
  5. Step 5: Solve for x
    x = 15,470,785,160.03/131,165.40
  6. Step 6: Final answer
    x = 117,948.68

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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.