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Finding the Fourth Proportional to 79,212.80, 118,624.80 and 52,774.40

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Solution

The fourth proportional to 79,212.80, 118,624.80 and 52,774.40 is: 79,032.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,212.80 : 118,624.80 = 52,774.40 : x
  2. Step 2: Convert to fraction form
    79,212.80/118,624.80 = 52,774.40/x
  3. Step 3: Cross multiply
    79,212.80x = 118,624.80 × 52,774.40
  4. Step 4: Simplify right side
    79,212.80x = 6,260,352,645.12
  5. Step 5: Solve for x
    x = 6,260,352,645.12/79,212.80
  6. Step 6: Final answer
    x = 79,032.08

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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.