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Finding the Fourth Proportional to 127,920.88, 191,881.77 and 39,174.01

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Solution

The fourth proportional to 127,920.88, 191,881.77 and 39,174.01 is: 58,761.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,920.88 : 191,881.77 = 39,174.01 : x
  2. Step 2: Convert to fraction form
    127,920.88/191,881.77 = 39,174.01/x
  3. Step 3: Cross multiply
    127,920.88x = 191,881.77 × 39,174.01
  4. Step 4: Simplify right side
    127,920.88x = 7,516,778,376.80
  5. Step 5: Solve for x
    x = 7,516,778,376.80/127,920.88
  6. Step 6: Final answer
    x = 58,761.15

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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.