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Finding the Fourth Proportional to 81,607,205.60, 122,477,730.60 and 80,969,476.40

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Solution

The fourth proportional to 81,607,205.60, 122,477,730.60 and 80,969,476.40 is: 121,520,613.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,607,205.60 : 122,477,730.60 = 80,969,476.40 : x
  2. Step 2: Convert to fraction form
    81,607,205.60/122,477,730.60 = 80,969,476.40/x
  3. Step 3: Cross multiply
    81,607,205.60x = 122,477,730.60 × 80,969,476.40
  4. Step 4: Simplify right side
    81,607,205.60x = 9,916,957,717,342,258
  5. Step 5: Solve for x
    x = 9,916,957,717,342,258/81,607,205.60
  6. Step 6: Final answer
    x = 121,520,613.83

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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.