Home / 131,887.20-197,830.80-81,148.80

Finding the Fourth Proportional to 131,887.20, 197,830.80 and 81,148.80

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Solution

The fourth proportional to 131,887.20, 197,830.80 and 81,148.80 is: 121,723.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,887.20 : 197,830.80 = 81,148.80 : x
  2. Step 2: Convert to fraction form
    131,887.20/197,830.80 = 81,148.80/x
  3. Step 3: Cross multiply
    131,887.20x = 197,830.80 × 81,148.80
  4. Step 4: Simplify right side
    131,887.20x = 16,053,732,023.04
  5. Step 5: Solve for x
    x = 16,053,732,023.04/131,887.20
  6. Step 6: Final answer
    x = 121,723.20

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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.