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Finding the Fourth Proportional to 90,644.88, 125,097.84 and 52,931.28

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Solution

The fourth proportional to 90,644.88, 125,097.84 and 52,931.28 is: 73,049.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,644.88 : 125,097.84 = 52,931.28 : x
  2. Step 2: Convert to fraction form
    90,644.88/125,097.84 = 52,931.28/x
  3. Step 3: Cross multiply
    90,644.88x = 125,097.84 × 52,931.28
  4. Step 4: Simplify right side
    90,644.88x = 6,621,588,796.44
  5. Step 5: Solve for x
    x = 6,621,588,796.44/90,644.88
  6. Step 6: Final answer
    x = 73,049.78

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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.