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Finding the Fourth Proportional to 81,360.96, 122,049.46 and 28,045.91

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Solution

The fourth proportional to 81,360.96, 122,049.46 and 28,045.91 is: 42,071.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,360.96 : 122,049.46 = 28,045.91 : x
  2. Step 2: Convert to fraction form
    81,360.96/122,049.46 = 28,045.91/x
  3. Step 3: Cross multiply
    81,360.96x = 122,049.46 × 28,045.91
  4. Step 4: Simplify right side
    81,360.96x = 3,422,988,637.21
  5. Step 5: Solve for x
    x = 3,422,988,637.21/81,360.96
  6. Step 6: Final answer
    x = 42,071.64

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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.