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Finding the Fourth Proportional to 100,701.59, 138,969.07 and 54,761.39

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Solution

The fourth proportional to 100,701.59, 138,969.07 and 54,761.39 is: 75,571.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,701.59 : 138,969.07 = 54,761.39 : x
  2. Step 2: Convert to fraction form
    100,701.59/138,969.07 = 54,761.39/x
  3. Step 3: Cross multiply
    100,701.59x = 138,969.07 × 54,761.39
  4. Step 4: Simplify right side
    100,701.59x = 7,610,138,608.46
  5. Step 5: Solve for x
    x = 7,610,138,608.46/100,701.59
  6. Step 6: Final answer
    x = 75,571.18

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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.