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Finding the Fourth Proportional to 40,661.20, 60,943.20 and 20,929.60

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Solution

The fourth proportional to 40,661.20, 60,943.20 and 20,929.60 is: 31,369.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,661.20 : 60,943.20 = 20,929.60 : x
  2. Step 2: Convert to fraction form
    40,661.20/60,943.20 = 20,929.60/x
  3. Step 3: Cross multiply
    40,661.20x = 60,943.20 × 20,929.60
  4. Step 4: Simplify right side
    40,661.20x = 1,275,516,798.72
  5. Step 5: Solve for x
    x = 1,275,516,798.72/40,661.20
  6. Step 6: Final answer
    x = 31,369.38

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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.