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Finding the Fourth Proportional to 133,993,869.60, 200,990,804.40 and 128,325,165.60

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Solution

The fourth proportional to 133,993,869.60, 200,990,804.40 and 128,325,165.60 is: 192,487,748.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,993,869.60 : 200,990,804.40 = 128,325,165.60 : x
  2. Step 2: Convert to fraction form
    133,993,869.60/200,990,804.40 = 128,325,165.60/x
  3. Step 3: Cross multiply
    133,993,869.60x = 200,990,804.40 × 128,325,165.60
  4. Step 4: Simplify right side
    133,993,869.60x = 25,792,178,258,707,208
  5. Step 5: Solve for x
    x = 25,792,178,258,707,208/133,993,869.60
  6. Step 6: Final answer
    x = 192,487,748.40

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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.