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Finding the Fourth Proportional to 392,787,605.87, 589,160,052.74 and 120,158,372.87

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Solution

The fourth proportional to 392,787,605.87, 589,160,052.74 and 120,158,372.87 is: 180,231,026.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,787,605.87 : 589,160,052.74 = 120,158,372.87 : x
  2. Step 2: Convert to fraction form
    392,787,605.87/589,160,052.74 = 120,158,372.87/x
  3. Step 3: Cross multiply
    392,787,605.87x = 589,160,052.74 × 120,158,372.87
  4. Step 4: Simplify right side
    392,787,605.87x = 70,792,513,293,695,192
  5. Step 5: Solve for x
    x = 70,792,513,293,695,192/392,787,605.87
  6. Step 6: Final answer
    x = 180,231,026.23

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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.