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Finding the Fourth Proportional to 100,694.16, 138,955.67 and 54,752.80

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Solution

The fourth proportional to 100,694.16, 138,955.67 and 54,752.80 is: 75,557.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,694.16 : 138,955.67 = 54,752.80 : x
  2. Step 2: Convert to fraction form
    100,694.16/138,955.67 = 54,752.80/x
  3. Step 3: Cross multiply
    100,694.16x = 138,955.67 × 54,752.80
  4. Step 4: Simplify right side
    100,694.16x = 7,608,212,008.38
  5. Step 5: Solve for x
    x = 7,608,212,008.38/100,694.16
  6. Step 6: Final answer
    x = 75,557.63

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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.