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Finding the Fourth Proportional to 100,553.51, 138,758.43 and 57,533.84

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Solution

The fourth proportional to 100,553.51, 138,758.43 and 57,533.84 is: 79,393.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,553.51 : 138,758.43 = 57,533.84 : x
  2. Step 2: Convert to fraction form
    100,553.51/138,758.43 = 57,533.84/x
  3. Step 3: Cross multiply
    100,553.51x = 138,758.43 × 57,533.84
  4. Step 4: Simplify right side
    100,553.51x = 7,983,305,310.27
  5. Step 5: Solve for x
    x = 7,983,305,310.27/100,553.51
  6. Step 6: Final answer
    x = 79,393.60

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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.