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Finding the Fourth Proportional to 100,693.53, 138,954.81 and 54,752.18

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Solution

The fourth proportional to 100,693.53, 138,954.81 and 54,752.18 is: 75,556.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,693.53 : 138,954.81 = 54,752.18 : x
  2. Step 2: Convert to fraction form
    100,693.53/138,954.81 = 54,752.18/x
  3. Step 3: Cross multiply
    100,693.53x = 138,954.81 × 54,752.18
  4. Step 4: Simplify right side
    100,693.53x = 7,608,078,768.99
  5. Step 5: Solve for x
    x = 7,608,078,768.99/100,693.53
  6. Step 6: Final answer
    x = 75,556.78

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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.