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Finding the Fourth Proportional to 90,486.64, 124,828.26 and 54,163.30

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Solution

The fourth proportional to 90,486.64, 124,828.26 and 54,163.30 is: 74,719.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,486.64 : 124,828.26 = 54,163.30 : x
  2. Step 2: Convert to fraction form
    90,486.64/124,828.26 = 54,163.30/x
  3. Step 3: Cross multiply
    90,486.64x = 124,828.26 × 54,163.30
  4. Step 4: Simplify right side
    90,486.64x = 6,761,110,494.86
  5. Step 5: Solve for x
    x = 6,761,110,494.86/90,486.64
  6. Step 6: Final answer
    x = 74,719.43

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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.