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Finding the Fourth Proportional to 127,434.60, 191,151.90 and 85,444.20

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Solution

The fourth proportional to 127,434.60, 191,151.90 and 85,444.20 is: 128,166.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,434.60 : 191,151.90 = 85,444.20 : x
  2. Step 2: Convert to fraction form
    127,434.60/191,151.90 = 85,444.20/x
  3. Step 3: Cross multiply
    127,434.60x = 191,151.90 × 85,444.20
  4. Step 4: Simplify right side
    127,434.60x = 16,332,821,173.98
  5. Step 5: Solve for x
    x = 16,332,821,173.98/127,434.60
  6. Step 6: Final answer
    x = 128,166.30

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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.