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Finding the Fourth Proportional to 118,371.78, 163,357.86 and 68,070.78

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Solution

The fourth proportional to 118,371.78, 163,357.86 and 68,070.78 is: 93,940.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,371.78 : 163,357.86 = 68,070.78 : x
  2. Step 2: Convert to fraction form
    118,371.78/163,357.86 = 68,070.78/x
  3. Step 3: Cross multiply
    118,371.78x = 163,357.86 × 68,070.78
  4. Step 4: Simplify right side
    118,371.78x = 11,119,896,949.33
  5. Step 5: Solve for x
    x = 11,119,896,949.33/118,371.78
  6. Step 6: Final answer
    x = 93,940.44

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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.