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Finding the Fourth Proportional to 223,081, 307,856.64 and 122,479

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Solution

The fourth proportional to 223,081, 307,856.64 and 122,479 is: 169,023.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,081 : 307,856.64 = 122,479 : x
  2. Step 2: Convert to fraction form
    223,081/307,856.64 = 122,479/x
  3. Step 3: Cross multiply
    223,081x = 307,856.64 × 122,479
  4. Step 4: Simplify right side
    223,081x = 37,705,973,410.56
  5. Step 5: Solve for x
    x = 37,705,973,410.56/223,081
  6. Step 6: Final answer
    x = 169,023.69

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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.