Home / 358,861,147.20-538,291,720.80-128,800,338.30

Finding the Fourth Proportional to 358,861,147.20, 538,291,720.80 and 128,800,338.30

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Solution

The fourth proportional to 358,861,147.20, 538,291,720.80 and 128,800,338.30 is: 193,200,507.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,861,147.20 : 538,291,720.80 = 128,800,338.30 : x
  2. Step 2: Convert to fraction form
    358,861,147.20/538,291,720.80 = 128,800,338.30/x
  3. Step 3: Cross multiply
    358,861,147.20x = 538,291,720.80 × 128,800,338.30
  4. Step 4: Simplify right side
    358,861,147.20x = 69,332,155,743,129,136
  5. Step 5: Solve for x
    x = 69,332,155,743,129,136/358,861,147.20
  6. Step 6: Final answer
    x = 193,200,507.45

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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.