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Finding the Fourth Proportional to 52,978.74, 79,394.22 and 39,815.70

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Solution

The fourth proportional to 52,978.74, 79,394.22 and 39,815.70 is: 59,668.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,978.74 : 79,394.22 = 39,815.70 : x
  2. Step 2: Convert to fraction form
    52,978.74/79,394.22 = 39,815.70/x
  3. Step 3: Cross multiply
    52,978.74x = 79,394.22 × 39,815.70
  4. Step 4: Simplify right side
    52,978.74x = 3,161,136,445.25
  5. Step 5: Solve for x
    x = 3,161,136,445.25/52,978.74
  6. Step 6: Final answer
    x = 59,668.02

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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.