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Finding the Fourth Proportional to 99,653,603.20, 149,480,404.80 and 45,905,891.20

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Solution

The fourth proportional to 99,653,603.20, 149,480,404.80 and 45,905,891.20 is: 68,858,836.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,653,603.20 : 149,480,404.80 = 45,905,891.20 : x
  2. Step 2: Convert to fraction form
    99,653,603.20/149,480,404.80 = 45,905,891.20/x
  3. Step 3: Cross multiply
    99,653,603.20x = 149,480,404.80 × 45,905,891.20
  4. Step 4: Simplify right side
    99,653,603.20x = 6,862,031,199,280,759
  5. Step 5: Solve for x
    x = 6,862,031,199,280,759/99,653,603.20
  6. Step 6: Final answer
    x = 68,858,836.80

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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.