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Finding the Fourth Proportional to 100,372.84, 138,504.54 and 57,945.04

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Solution

The fourth proportional to 100,372.84, 138,504.54 and 57,945.04 is: 79,958.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,372.84 : 138,504.54 = 57,945.04 : x
  2. Step 2: Convert to fraction form
    100,372.84/138,504.54 = 57,945.04/x
  3. Step 3: Cross multiply
    100,372.84x = 138,504.54 × 57,945.04
  4. Step 4: Simplify right side
    100,372.84x = 8,025,651,110.48
  5. Step 5: Solve for x
    x = 8,025,651,110.48/100,372.84
  6. Step 6: Final answer
    x = 79,958.39

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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.