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Finding the Fourth Proportional to 84,219,628.80, 126,329,443.20 and 84,219,628.80

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Solution

The fourth proportional to 84,219,628.80, 126,329,443.20 and 84,219,628.80 is: 126,329,443.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,219,628.80 : 126,329,443.20 = 84,219,628.80 : x
  2. Step 2: Convert to fraction form
    84,219,628.80/126,329,443.20 = 84,219,628.80/x
  3. Step 3: Cross multiply
    84,219,628.80x = 126,329,443.20 × 84,219,628.80
  4. Step 4: Simplify right side
    84,219,628.80x = 10,639,418,812,814,684
  5. Step 5: Solve for x
    x = 10,639,418,812,814,684/84,219,628.80
  6. Step 6: Final answer
    x = 126,329,443.20

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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.