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Finding the Fourth Proportional to 127,881.51, 191,850.36 and 39,141.86

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Solution

The fourth proportional to 127,881.51, 191,850.36 and 39,141.86 is: 58,721.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,881.51 : 191,850.36 = 39,141.86 : x
  2. Step 2: Convert to fraction form
    127,881.51/191,850.36 = 39,141.86/x
  3. Step 3: Cross multiply
    127,881.51x = 191,850.36 × 39,141.86
  4. Step 4: Simplify right side
    127,881.51x = 7,509,379,839.04
  5. Step 5: Solve for x
    x = 7,509,379,839.04/127,881.51
  6. Step 6: Final answer
    x = 58,721.39

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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.