Home / 131,243.20-196,864.80-78,625.60

Finding the Fourth Proportional to 131,243.20, 196,864.80 and 78,625.60

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Solution

The fourth proportional to 131,243.20, 196,864.80 and 78,625.60 is: 117,938.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,243.20 : 196,864.80 = 78,625.60 : x
  2. Step 2: Convert to fraction form
    131,243.20/196,864.80 = 78,625.60/x
  3. Step 3: Cross multiply
    131,243.20x = 196,864.80 × 78,625.60
  4. Step 4: Simplify right side
    131,243.20x = 15,478,613,018.88
  5. Step 5: Solve for x
    x = 15,478,613,018.88/131,243.20
  6. Step 6: Final answer
    x = 117,938.40

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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.