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Finding the Fourth Proportional to 93,143.78, 138,940.91 and 84,175.46

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Solution

The fourth proportional to 93,143.78, 138,940.91 and 84,175.46 is: 125,563.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,143.78 : 138,940.91 = 84,175.46 : x
  2. Step 2: Convert to fraction form
    93,143.78/138,940.91 = 84,175.46/x
  3. Step 3: Cross multiply
    93,143.78x = 138,940.91 × 84,175.46
  4. Step 4: Simplify right side
    93,143.78x = 11,695,414,527.80
  5. Step 5: Solve for x
    x = 11,695,414,527.80/93,143.78
  6. Step 6: Final answer
    x = 125,563.03

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.