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Finding the Fourth Proportional to 84,563,362.80, 126,845,044.20 and 71,425,033.20

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Solution

The fourth proportional to 84,563,362.80, 126,845,044.20 and 71,425,033.20 is: 107,137,549.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,563,362.80 : 126,845,044.20 = 71,425,033.20 : x
  2. Step 2: Convert to fraction form
    84,563,362.80/126,845,044.20 = 71,425,033.20/x
  3. Step 3: Cross multiply
    84,563,362.80x = 126,845,044.20 × 71,425,033.20
  4. Step 4: Simplify right side
    84,563,362.80x = 9,059,911,493,240,468
  5. Step 5: Solve for x
    x = 9,059,911,493,240,468/84,563,362.80
  6. Step 6: Final answer
    x = 107,137,549.80

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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.