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Finding the Fourth Proportional to 207,711.99, 286,662.78 and 122,856.39

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Solution

The fourth proportional to 207,711.99, 286,662.78 and 122,856.39 is: 169,553.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,711.99 : 286,662.78 = 122,856.39 : x
  2. Step 2: Convert to fraction form
    207,711.99/286,662.78 = 122,856.39/x
  3. Step 3: Cross multiply
    207,711.99x = 286,662.78 × 122,856.39
  4. Step 4: Simplify right side
    207,711.99x = 35,218,354,298.16
  5. Step 5: Solve for x
    x = 35,218,354,298.16/207,711.99
  6. Step 6: Final answer
    x = 169,553.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.