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Finding the Fourth Proportional to 100,694.60, 138,923.94 and 62,440.40

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Solution

The fourth proportional to 100,694.60, 138,923.94 and 62,440.40 is: 86,146.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,694.60 : 138,923.94 = 62,440.40 : x
  2. Step 2: Convert to fraction form
    100,694.60/138,923.94 = 62,440.40/x
  3. Step 3: Cross multiply
    100,694.60x = 138,923.94 × 62,440.40
  4. Step 4: Simplify right side
    100,694.60x = 8,674,466,383.18
  5. Step 5: Solve for x
    x = 8,674,466,383.18/100,694.60
  6. Step 6: Final answer
    x = 86,146.29

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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.