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Finding the Fourth Proportional to 133,806,493.80, 200,709,740.70 and 128,704,660.20

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Solution

The fourth proportional to 133,806,493.80, 200,709,740.70 and 128,704,660.20 is: 193,056,990.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,806,493.80 : 200,709,740.70 = 128,704,660.20 : x
  2. Step 2: Convert to fraction form
    133,806,493.80/200,709,740.70 = 128,704,660.20/x
  3. Step 3: Cross multiply
    133,806,493.80x = 200,709,740.70 × 128,704,660.20
  4. Step 4: Simplify right side
    133,806,493.80x = 25,832,278,975,623,608
  5. Step 5: Solve for x
    x = 25,832,278,975,623,608/133,806,493.80
  6. Step 6: Final answer
    x = 193,056,990.30

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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.