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Finding the Fourth Proportional to 66,435,728.80, 99,653,593.20 and 30,603,920.80

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Solution

The fourth proportional to 66,435,728.80, 99,653,593.20 and 30,603,920.80 is: 45,905,881.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,435,728.80 : 99,653,593.20 = 30,603,920.80 : x
  2. Step 2: Convert to fraction form
    66,435,728.80/99,653,593.20 = 30,603,920.80/x
  3. Step 3: Cross multiply
    66,435,728.80x = 99,653,593.20 × 30,603,920.80
  4. Step 4: Simplify right side
    66,435,728.80x = 3,049,790,673,728,218.50
  5. Step 5: Solve for x
    x = 3,049,790,673,728,218.50/66,435,728.80
  6. Step 6: Final answer
    x = 45,905,881.20

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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.