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Finding the Fourth Proportional to 238,912.88, 358,283.93 and 78,959.21

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Solution

The fourth proportional to 238,912.88, 358,283.93 and 78,959.21 is: 118,410.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,912.88 : 358,283.93 = 78,959.21 : x
  2. Step 2: Convert to fraction form
    238,912.88/358,283.93 = 78,959.21/x
  3. Step 3: Cross multiply
    238,912.88x = 358,283.93 × 78,959.21
  4. Step 4: Simplify right side
    238,912.88x = 28,289,813,882.28
  5. Step 5: Solve for x
    x = 28,289,813,882.28/238,912.88
  6. Step 6: Final answer
    x = 118,410.59

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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.