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Finding the Fourth Proportional to 127,967.60, 191,951.40 and 85,977.20

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Solution

The fourth proportional to 127,967.60, 191,951.40 and 85,977.20 is: 128,965.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,967.60 : 191,951.40 = 85,977.20 : x
  2. Step 2: Convert to fraction form
    127,967.60/191,951.40 = 85,977.20/x
  3. Step 3: Cross multiply
    127,967.60x = 191,951.40 × 85,977.20
  4. Step 4: Simplify right side
    127,967.60x = 16,503,443,908.08
  5. Step 5: Solve for x
    x = 16,503,443,908.08/127,967.60
  6. Step 6: Final answer
    x = 128,965.80

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1.5x scale

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.