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Finding the Fourth Proportional to 156,413.70, 215,880.80 and 92,786.58

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Solution

The fourth proportional to 156,413.70, 215,880.80 and 92,786.58 is: 128,063.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,413.70 : 215,880.80 = 92,786.58 : x
  2. Step 2: Convert to fraction form
    156,413.70/215,880.80 = 92,786.58/x
  3. Step 3: Cross multiply
    156,413.70x = 215,880.80 × 92,786.58
  4. Step 4: Simplify right side
    156,413.70x = 20,030,840,655.73
  5. Step 5: Solve for x
    x = 20,030,840,655.73/156,413.70
  6. Step 6: Final answer
    x = 128,063.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.