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Finding the Fourth Proportional to 218,731,808.40, 328,097,712.60 and 89,296,400.40

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Solution

The fourth proportional to 218,731,808.40, 328,097,712.60 and 89,296,400.40 is: 133,944,600.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,731,808.40 : 328,097,712.60 = 89,296,400.40 : x
  2. Step 2: Convert to fraction form
    218,731,808.40/328,097,712.60 = 89,296,400.40/x
  3. Step 3: Cross multiply
    218,731,808.40x = 328,097,712.60 × 89,296,400.40
  4. Step 4: Simplify right side
    218,731,808.40x = 29,297,944,714,653,728
  5. Step 5: Solve for x
    x = 29,297,944,714,653,728/218,731,808.40
  6. Step 6: Final answer
    x = 133,944,600.60

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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.