Home / 131,142.20-196,713.30-128,226.20

Finding the Fourth Proportional to 131,142.20, 196,713.30 and 128,226.20

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Solution

The fourth proportional to 131,142.20, 196,713.30 and 128,226.20 is: 192,339.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,142.20 : 196,713.30 = 128,226.20 : x
  2. Step 2: Convert to fraction form
    131,142.20/196,713.30 = 128,226.20/x
  3. Step 3: Cross multiply
    131,142.20x = 196,713.30 × 128,226.20
  4. Step 4: Simplify right side
    131,142.20x = 25,223,798,948.46
  5. Step 5: Solve for x
    x = 25,223,798,948.46/131,142.20
  6. Step 6: Final answer
    x = 192,339.30

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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.