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Finding the Fourth Proportional to 119,991.78, 179,985.78 and 31,243.32

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Solution

The fourth proportional to 119,991.78, 179,985.78 and 31,243.32 is: 46,864.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,991.78 : 179,985.78 = 31,243.32 : x
  2. Step 2: Convert to fraction form
    119,991.78/179,985.78 = 31,243.32/x
  3. Step 3: Cross multiply
    119,991.78x = 179,985.78 × 31,243.32
  4. Step 4: Simplify right side
    119,991.78x = 5,623,353,319.99
  5. Step 5: Solve for x
    x = 5,623,353,319.99/119,991.78
  6. Step 6: Final answer
    x = 46,864.49

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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.