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Finding the Fourth Proportional to 127,991.61, 191,980.24 and 39,244.87

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Solution

The fourth proportional to 127,991.61, 191,980.24 and 39,244.87 is: 58,865.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,991.61 : 191,980.24 = 39,244.87 : x
  2. Step 2: Convert to fraction form
    127,991.61/191,980.24 = 39,244.87/x
  3. Step 3: Cross multiply
    127,991.61x = 191,980.24 × 39,244.87
  4. Step 4: Simplify right side
    127,991.61x = 7,534,239,703.23
  5. Step 5: Solve for x
    x = 7,534,239,703.23/127,991.61
  6. Step 6: Final answer
    x = 58,865.11

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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.