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Finding the Fourth Proportional to 99,408,028.80, 149,023,396.80 and 38,809,660.80

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Solution

The fourth proportional to 99,408,028.80, 149,023,396.80 and 38,809,660.80 is: 58,179,882.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,408,028.80 : 149,023,396.80 = 38,809,660.80 : x
  2. Step 2: Convert to fraction form
    99,408,028.80/149,023,396.80 = 38,809,660.80/x
  3. Step 3: Cross multiply
    99,408,028.80x = 149,023,396.80 × 38,809,660.80
  4. Step 4: Simplify right side
    99,408,028.80x = 5,783,547,481,071,805
  5. Step 5: Solve for x
    x = 5,783,547,481,071,805/99,408,028.80
  6. Step 6: Final answer
    x = 58,179,882.96

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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.