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Finding the Fourth Proportional to 222,491, 307,037.76 and 121,889

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Solution

The fourth proportional to 222,491, 307,037.76 and 121,889 is: 168,206.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    222,491 : 307,037.76 = 121,889 : x
  2. Step 2: Convert to fraction form
    222,491/307,037.76 = 121,889/x
  3. Step 3: Cross multiply
    222,491x = 307,037.76 × 121,889
  4. Step 4: Simplify right side
    222,491x = 37,424,525,528.64
  5. Step 5: Solve for x
    x = 37,424,525,528.64/222,491
  6. Step 6: Final answer
    x = 168,206.92

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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.