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Finding the Fourth Proportional to 192,023.20, 288,034.80 and 81,215.20

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Solution

The fourth proportional to 192,023.20, 288,034.80 and 81,215.20 is: 121,822.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,023.20 : 288,034.80 = 81,215.20 : x
  2. Step 2: Convert to fraction form
    192,023.20/288,034.80 = 81,215.20/x
  3. Step 3: Cross multiply
    192,023.20x = 288,034.80 × 81,215.20
  4. Step 4: Simplify right side
    192,023.20x = 23,392,803,888.96
  5. Step 5: Solve for x
    x = 23,392,803,888.96/192,023.20
  6. Step 6: Final answer
    x = 121,822.80

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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.