Home / 392,688,015.20-589,032,022.80-133,817,199.20

Finding the Fourth Proportional to 392,688,015.20, 589,032,022.80 and 133,817,199.20

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Solution

The fourth proportional to 392,688,015.20, 589,032,022.80 and 133,817,199.20 is: 200,725,798.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,688,015.20 : 589,032,022.80 = 133,817,199.20 : x
  2. Step 2: Convert to fraction form
    392,688,015.20/589,032,022.80 = 133,817,199.20/x
  3. Step 3: Cross multiply
    392,688,015.20x = 589,032,022.80 × 133,817,199.20
  4. Step 4: Simplify right side
    392,688,015.20x = 78,822,615,530,206,544
  5. Step 5: Solve for x
    x = 78,822,615,530,206,544/392,688,015.20
  6. Step 6: Final answer
    x = 200,725,798.80

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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.