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Finding the Fourth Proportional to 40,477.78, 60,721.76 and 21,732.05

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Solution

The fourth proportional to 40,477.78, 60,721.76 and 21,732.05 is: 32,600.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,477.78 : 60,721.76 = 21,732.05 : x
  2. Step 2: Convert to fraction form
    40,477.78/60,721.76 = 21,732.05/x
  3. Step 3: Cross multiply
    40,477.78x = 60,721.76 × 21,732.05
  4. Step 4: Simplify right side
    40,477.78x = 1,319,608,215.75
  5. Step 5: Solve for x
    x = 1,319,608,215.75/40,477.78
  6. Step 6: Final answer
    x = 32,600.81

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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.