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Finding the Fourth Proportional to 191,568.88, 287,353.40 and 79,125.53

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Solution

The fourth proportional to 191,568.88, 287,353.40 and 79,125.53 is: 118,688.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,568.88 : 287,353.40 = 79,125.53 : x
  2. Step 2: Convert to fraction form
    191,568.88/287,353.40 = 79,125.53/x
  3. Step 3: Cross multiply
    191,568.88x = 287,353.40 × 79,125.53
  4. Step 4: Simplify right side
    191,568.88x = 22,736,990,072.30
  5. Step 5: Solve for x
    x = 22,736,990,072.30/191,568.88
  6. Step 6: Final answer
    x = 118,688.33

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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.