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Finding the Fourth Proportional to 73,212.80, 109,819.20 and 72,694.40

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Solution

The fourth proportional to 73,212.80, 109,819.20 and 72,694.40 is: 109,041.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,212.80 : 109,819.20 = 72,694.40 : x
  2. Step 2: Convert to fraction form
    73,212.80/109,819.20 = 72,694.40/x
  3. Step 3: Cross multiply
    73,212.80x = 109,819.20 × 72,694.40
  4. Step 4: Simplify right side
    73,212.80x = 7,983,240,852.48
  5. Step 5: Solve for x
    x = 7,983,240,852.48/73,212.80
  6. Step 6: Final answer
    x = 109,041.60

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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.