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Finding the Fourth Proportional to 247,295.72, 370,970.85 and 78,776.84

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Solution

The fourth proportional to 247,295.72, 370,970.85 and 78,776.84 is: 118,173.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,295.72 : 370,970.85 = 78,776.84 : x
  2. Step 2: Convert to fraction form
    247,295.72/370,970.85 = 78,776.84/x
  3. Step 3: Cross multiply
    247,295.72x = 370,970.85 × 78,776.84
  4. Step 4: Simplify right side
    247,295.72x = 29,223,911,295.11
  5. Step 5: Solve for x
    x = 29,223,911,295.11/247,295.72
  6. Step 6: Final answer
    x = 118,173.95

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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.