Home / 131,189.40-196,784.10-81,325.80

Finding the Fourth Proportional to 131,189.40, 196,784.10 and 81,325.80

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Solution

The fourth proportional to 131,189.40, 196,784.10 and 81,325.80 is: 121,988.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,189.40 : 196,784.10 = 81,325.80 : x
  2. Step 2: Convert to fraction form
    131,189.40/196,784.10 = 81,325.80/x
  3. Step 3: Cross multiply
    131,189.40x = 196,784.10 × 81,325.80
  4. Step 4: Simplify right side
    131,189.40x = 16,003,624,359.78
  5. Step 5: Solve for x
    x = 16,003,624,359.78/131,189.40
  6. Step 6: Final answer
    x = 121,988.70

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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.