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Finding the Fourth Proportional to 99,645,363.60, 149,468,045.40 and 81,470,081.40

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Solution

The fourth proportional to 99,645,363.60, 149,468,045.40 and 81,470,081.40 is: 122,205,122.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,645,363.60 : 149,468,045.40 = 81,470,081.40 : x
  2. Step 2: Convert to fraction form
    99,645,363.60/149,468,045.40 = 81,470,081.40/x
  3. Step 3: Cross multiply
    99,645,363.60x = 149,468,045.40 × 81,470,081.40
  4. Step 4: Simplify right side
    99,645,363.60x = 12,177,173,825,436,896
  5. Step 5: Solve for x
    x = 12,177,173,825,436,896/99,645,363.60
  6. Step 6: Final answer
    x = 122,205,122.10

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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.