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Finding the Fourth Proportional to 90,610.61, 135,855.92 and 43,233.01

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Solution

The fourth proportional to 90,610.61, 135,855.92 and 43,233.01 is: 64,820.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,610.61 : 135,855.92 = 43,233.01 : x
  2. Step 2: Convert to fraction form
    90,610.61/135,855.92 = 43,233.01/x
  3. Step 3: Cross multiply
    90,610.61x = 135,855.92 × 43,233.01
  4. Step 4: Simplify right side
    90,610.61x = 5,873,460,347.92
  5. Step 5: Solve for x
    x = 5,873,460,347.92/90,610.61
  6. Step 6: Final answer
    x = 64,820.89

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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.