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Finding the Fourth Proportional to 239,129.52, 358,690.44 and 81,467.76

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Solution

The fourth proportional to 239,129.52, 358,690.44 and 81,467.76 is: 122,200.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,129.52 : 358,690.44 = 81,467.76 : x
  2. Step 2: Convert to fraction form
    239,129.52/358,690.44 = 81,467.76/x
  3. Step 3: Cross multiply
    239,129.52x = 358,690.44 × 81,467.76
  4. Step 4: Simplify right side
    239,129.52x = 29,221,706,680.21
  5. Step 5: Solve for x
    x = 29,221,706,680.21/239,129.52
  6. Step 6: Final answer
    x = 122,200.33

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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.