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Finding the Fourth Proportional to 192,105.60, 288,004.80 and 81,206.40

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Solution

The fourth proportional to 192,105.60, 288,004.80 and 81,206.40 is: 121,744.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,105.60 : 288,004.80 = 81,206.40 : x
  2. Step 2: Convert to fraction form
    192,105.60/288,004.80 = 81,206.40/x
  3. Step 3: Cross multiply
    192,105.60x = 288,004.80 × 81,206.40
  4. Step 4: Simplify right side
    192,105.60x = 23,387,832,990.72
  5. Step 5: Solve for x
    x = 23,387,832,990.72/192,105.60
  6. Step 6: Final answer
    x = 121,744.67

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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.