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Finding the Fourth Proportional to 127,620.72, 191,440.80 and 38,881.80

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Solution

The fourth proportional to 127,620.72, 191,440.80 and 38,881.80 is: 58,325.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,620.72 : 191,440.80 = 38,881.80 : x
  2. Step 2: Convert to fraction form
    127,620.72/191,440.80 = 38,881.80/x
  3. Step 3: Cross multiply
    127,620.72x = 191,440.80 × 38,881.80
  4. Step 4: Simplify right side
    127,620.72x = 7,443,562,897.44
  5. Step 5: Solve for x
    x = 7,443,562,897.44/127,620.72
  6. Step 6: Final answer
    x = 58,325.66

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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.