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Finding the Fourth Proportional to 209,490.80, 289,097.37 and 113,995.44

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Solution

The fourth proportional to 209,490.80, 289,097.37 and 113,995.44 is: 157,313.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,490.80 : 289,097.37 = 113,995.44 : x
  2. Step 2: Convert to fraction form
    209,490.80/289,097.37 = 113,995.44/x
  3. Step 3: Cross multiply
    209,490.80x = 289,097.37 × 113,995.44
  4. Step 4: Simplify right side
    209,490.80x = 32,955,781,895.99
  5. Step 5: Solve for x
    x = 32,955,781,895.99/209,490.80
  6. Step 6: Final answer
    x = 157,313.75

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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.