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Finding the Fourth Proportional to 81,788,512.80, 122,578,570.80 and 43,468,384.80

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Solution

The fourth proportional to 81,788,512.80, 122,578,570.80 and 43,468,384.80 is: 65,147,198.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,788,512.80 : 122,578,570.80 = 43,468,384.80 : x
  2. Step 2: Convert to fraction form
    81,788,512.80/122,578,570.80 = 43,468,384.80/x
  3. Step 3: Cross multiply
    81,788,512.80x = 122,578,570.80 × 43,468,384.80
  4. Step 4: Simplify right side
    81,788,512.80x = 5,328,292,483,768,443
  5. Step 5: Solve for x
    x = 5,328,292,483,768,443/81,788,512.80
  6. Step 6: Final answer
    x = 65,147,198.57

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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.