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Finding the Fourth Proportional to 221,616,989.60, 332,425,484.40 and 129,783,984.80

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Solution

The fourth proportional to 221,616,989.60, 332,425,484.40 and 129,783,984.80 is: 194,675,977.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,616,989.60 : 332,425,484.40 = 129,783,984.80 : x
  2. Step 2: Convert to fraction form
    221,616,989.60/332,425,484.40 = 129,783,984.80/x
  3. Step 3: Cross multiply
    221,616,989.60x = 332,425,484.40 × 129,783,984.80
  4. Step 4: Simplify right side
    221,616,989.60x = 43,143,504,014,502,232
  5. Step 5: Solve for x
    x = 43,143,504,014,502,232/221,616,989.60
  6. Step 6: Final answer
    x = 194,675,977.20

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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.