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Finding the Fourth Proportional to 127,553.80, 191,330.70 and 80,859.40

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Solution

The fourth proportional to 127,553.80, 191,330.70 and 80,859.40 is: 121,289.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,553.80 : 191,330.70 = 80,859.40 : x
  2. Step 2: Convert to fraction form
    127,553.80/191,330.70 = 80,859.40/x
  3. Step 3: Cross multiply
    127,553.80x = 191,330.70 × 80,859.40
  4. Step 4: Simplify right side
    127,553.80x = 15,470,885,603.58
  5. Step 5: Solve for x
    x = 15,470,885,603.58/127,553.80
  6. Step 6: Final answer
    x = 121,289.10

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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.