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Finding the Fourth Proportional to 54,555,978.33, 81,844,747.88 and 20,012,700.91

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Solution

The fourth proportional to 54,555,978.33, 81,844,747.88 and 20,012,700.91 is: 30,023,005.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,555,978.33 : 81,844,747.88 = 20,012,700.91 : x
  2. Step 2: Convert to fraction form
    54,555,978.33/81,844,747.88 = 20,012,700.91/x
  3. Step 3: Cross multiply
    54,555,978.33x = 81,844,747.88 × 20,012,700.91
  4. Step 4: Simplify right side
    54,555,978.33x = 1,637,934,460,376,796.50
  5. Step 5: Solve for x
    x = 1,637,934,460,376,796.50/54,555,978.33
  6. Step 6: Final answer
    x = 30,023,005.92

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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.