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Finding the Fourth Proportional to 100,662.35, 138,914.13 and 55,341.10

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Solution

The fourth proportional to 100,662.35, 138,914.13 and 55,341.10 is: 76,370.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,662.35 : 138,914.13 = 55,341.10 : x
  2. Step 2: Convert to fraction form
    100,662.35/138,914.13 = 55,341.10/x
  3. Step 3: Cross multiply
    100,662.35x = 138,914.13 × 55,341.10
  4. Step 4: Simplify right side
    100,662.35x = 7,687,661,107.03
  5. Step 5: Solve for x
    x = 7,687,661,107.03/100,662.35
  6. Step 6: Final answer
    x = 76,370.77

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1.5x scale

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.