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Finding the Fourth Proportional to 138,007.77, 207,011.39 and 43,245.20

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Solution

The fourth proportional to 138,007.77, 207,011.39 and 43,245.20 is: 64,867.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,007.77 : 207,011.39 = 43,245.20 : x
  2. Step 2: Convert to fraction form
    138,007.77/207,011.39 = 43,245.20/x
  3. Step 3: Cross multiply
    138,007.77x = 207,011.39 × 43,245.20
  4. Step 4: Simplify right side
    138,007.77x = 8,952,247,711.55
  5. Step 5: Solve for x
    x = 8,952,247,711.55/138,007.77
  6. Step 6: Final answer
    x = 64,867.71

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1.5x scale

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.