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Finding the Fourth Proportional to 90,838, 136,240.86 and 27,642.88

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Solution

The fourth proportional to 90,838, 136,240.86 and 27,642.88 is: 41,459.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,838 : 136,240.86 = 27,642.88 : x
  2. Step 2: Convert to fraction form
    90,838/136,240.86 = 27,642.88/x
  3. Step 3: Cross multiply
    90,838x = 136,240.86 × 27,642.88
  4. Step 4: Simplify right side
    90,838x = 3,766,089,744.08
  5. Step 5: Solve for x
    x = 3,766,089,744.08/90,838
  6. Step 6: Final answer
    x = 41,459.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.