Home / 128,802.20-192,944.10-86,811.80

Finding the Fourth Proportional to 128,802.20, 192,944.10 and 86,811.80

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Solution

The fourth proportional to 128,802.20, 192,944.10 and 86,811.80 is: 130,043.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,802.20 : 192,944.10 = 86,811.80 : x
  2. Step 2: Convert to fraction form
    128,802.20/192,944.10 = 86,811.80/x
  3. Step 3: Cross multiply
    128,802.20x = 192,944.10 × 86,811.80
  4. Step 4: Simplify right side
    128,802.20x = 16,749,824,620.38
  5. Step 5: Solve for x
    x = 16,749,824,620.38/128,802.20
  6. Step 6: Final answer
    x = 130,043.00

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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.