Home / 81,129,116.40-111,996,786.50-54,352,553.15

Finding the Fourth Proportional to 81,129,116.40, 111,996,786.50 and 54,352,553.15

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Solution

The fourth proportional to 81,129,116.40, 111,996,786.50 and 54,352,553.15 is: 75,032,387.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,129,116.40 : 111,996,786.50 = 54,352,553.15 : x
  2. Step 2: Convert to fraction form
    81,129,116.40/111,996,786.50 = 54,352,553.15/x
  3. Step 3: Cross multiply
    81,129,116.40x = 111,996,786.50 × 54,352,553.15
  4. Step 4: Simplify right side
    81,129,116.40x = 6,087,311,290,870,452
  5. Step 5: Solve for x
    x = 6,087,311,290,870,452/81,129,116.40
  6. Step 6: Final answer
    x = 75,032,387.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.