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Finding the Fourth Proportional to 92,953.20, 127,978.20 and 78,783.60

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Solution

The fourth proportional to 92,953.20, 127,978.20 and 78,783.60 is: 108,469.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,953.20 : 127,978.20 = 78,783.60 : x
  2. Step 2: Convert to fraction form
    92,953.20/127,978.20 = 78,783.60/x
  3. Step 3: Cross multiply
    92,953.20x = 127,978.20 × 78,783.60
  4. Step 4: Simplify right side
    92,953.20x = 10,082,583,317.52
  5. Step 5: Solve for x
    x = 10,082,583,317.52/92,953.20
  6. Step 6: Final answer
    x = 108,469.46

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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.