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Finding the Fourth Proportional to 134,940.52, 186,203.78 and 78,340.84

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Solution

The fourth proportional to 134,940.52, 186,203.78 and 78,340.84 is: 108,102.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,940.52 : 186,203.78 = 78,340.84 : x
  2. Step 2: Convert to fraction form
    134,940.52/186,203.78 = 78,340.84/x
  3. Step 3: Cross multiply
    134,940.52x = 186,203.78 × 78,340.84
  4. Step 4: Simplify right side
    134,940.52x = 14,587,360,536.38
  5. Step 5: Solve for x
    x = 14,587,360,536.38/134,940.52
  6. Step 6: Final answer
    x = 108,102.15

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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.