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Finding the Fourth Proportional to 219,438.78, 329,124.47 and 69,659.61

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Solution

The fourth proportional to 219,438.78, 329,124.47 and 69,659.61 is: 104,478.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,438.78 : 329,124.47 = 69,659.61 : x
  2. Step 2: Convert to fraction form
    219,438.78/329,124.47 = 69,659.61/x
  3. Step 3: Cross multiply
    219,438.78x = 329,124.47 × 69,659.61
  4. Step 4: Simplify right side
    219,438.78x = 22,926,681,873.36
  5. Step 5: Solve for x
    x = 22,926,681,873.36/219,438.78
  6. Step 6: Final answer
    x = 104,478.72

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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.