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Finding the Fourth Proportional to 272,558.37, 408,921.12 and 139,532.88

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Solution

The fourth proportional to 272,558.37, 408,921.12 and 139,532.88 is: 209,342.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,558.37 : 408,921.12 = 139,532.88 : x
  2. Step 2: Convert to fraction form
    272,558.37/408,921.12 = 139,532.88/x
  3. Step 3: Cross multiply
    272,558.37x = 408,921.12 × 139,532.88
  4. Step 4: Simplify right side
    272,558.37x = 57,057,941,566.43
  5. Step 5: Solve for x
    x = 57,057,941,566.43/272,558.37
  6. Step 6: Final answer
    x = 209,342.10

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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.