Home / 131,786.20-197,679.30-72,591.40

Finding the Fourth Proportional to 131,786.20, 197,679.30 and 72,591.40

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Solution

The fourth proportional to 131,786.20, 197,679.30 and 72,591.40 is: 108,887.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,786.20 : 197,679.30 = 72,591.40 : x
  2. Step 2: Convert to fraction form
    131,786.20/197,679.30 = 72,591.40/x
  3. Step 3: Cross multiply
    131,786.20x = 197,679.30 × 72,591.40
  4. Step 4: Simplify right side
    131,786.20x = 14,349,817,138.02
  5. Step 5: Solve for x
    x = 14,349,817,138.02/131,786.20
  6. Step 6: Final answer
    x = 108,887.10

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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.