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Finding the Fourth Proportional to 272,248.92, 408,373.38 and 85,275

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Solution

The fourth proportional to 272,248.92, 408,373.38 and 85,275 is: 127,912.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,248.92 : 408,373.38 = 85,275 : x
  2. Step 2: Convert to fraction form
    272,248.92/408,373.38 = 85,275/x
  3. Step 3: Cross multiply
    272,248.92x = 408,373.38 × 85,275
  4. Step 4: Simplify right side
    272,248.92x = 34,824,039,979.50
  5. Step 5: Solve for x
    x = 34,824,039,979.50/272,248.92
  6. Step 6: Final answer
    x = 127,912.50

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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.