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Finding the Fourth Proportional to 84,574,462.80, 126,861,694.20 and 82,448,698.80

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Solution

The fourth proportional to 84,574,462.80, 126,861,694.20 and 82,448,698.80 is: 123,673,048.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,574,462.80 : 126,861,694.20 = 82,448,698.80 : x
  2. Step 2: Convert to fraction form
    84,574,462.80/126,861,694.20 = 82,448,698.80/x
  3. Step 3: Cross multiply
    84,574,462.80x = 126,861,694.20 × 82,448,698.80
  4. Step 4: Simplify right side
    84,574,462.80x = 10,459,581,614,353,506
  5. Step 5: Solve for x
    x = 10,459,581,614,353,506/84,574,462.80
  6. Step 6: Final answer
    x = 123,673,048.20

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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.