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Finding the Fourth Proportional to 92,479.20, 138,718.80 and 33,316.80

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Solution

The fourth proportional to 92,479.20, 138,718.80 and 33,316.80 is: 49,975.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,479.20 : 138,718.80 = 33,316.80 : x
  2. Step 2: Convert to fraction form
    92,479.20/138,718.80 = 33,316.80/x
  3. Step 3: Cross multiply
    92,479.20x = 138,718.80 × 33,316.80
  4. Step 4: Simplify right side
    92,479.20x = 4,621,666,515.84
  5. Step 5: Solve for x
    x = 4,621,666,515.84/92,479.20
  6. Step 6: Final answer
    x = 49,975.20

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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.