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Finding the Fourth Proportional to 272,509.92, 408,805.92 and 85,536

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Solution

The fourth proportional to 272,509.92, 408,805.92 and 85,536 is: 128,316.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,509.92 : 408,805.92 = 85,536 : x
  2. Step 2: Convert to fraction form
    272,509.92/408,805.92 = 85,536/x
  3. Step 3: Cross multiply
    272,509.92x = 408,805.92 × 85,536
  4. Step 4: Simplify right side
    272,509.92x = 34,967,623,173.12
  5. Step 5: Solve for x
    x = 34,967,623,173.12/272,509.92
  6. Step 6: Final answer
    x = 128,316.88

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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.