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Finding the Fourth Proportional to 81,788,574.80, 122,578,663.80 and 43,468,446.80

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Solution

The fourth proportional to 81,788,574.80, 122,578,663.80 and 43,468,446.80 is: 65,147,291.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,788,574.80 : 122,578,663.80 = 43,468,446.80 : x
  2. Step 2: Convert to fraction form
    81,788,574.80/122,578,663.80 = 43,468,446.80/x
  3. Step 3: Cross multiply
    81,788,574.80x = 122,578,663.80 × 43,468,446.80
  4. Step 4: Simplify right side
    81,788,574.80x = 5,328,304,126,205,385
  5. Step 5: Solve for x
    x = 5,328,304,126,205,385/81,788,574.80
  6. Step 6: Final answer
    x = 65,147,291.53

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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.