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Finding the Fourth Proportional to 122,991.48, 184,513.14 and 39,879

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Solution

The fourth proportional to 122,991.48, 184,513.14 and 39,879 is: 59,826.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,991.48 : 184,513.14 = 39,879 : x
  2. Step 2: Convert to fraction form
    122,991.48/184,513.14 = 39,879/x
  3. Step 3: Cross multiply
    122,991.48x = 184,513.14 × 39,879
  4. Step 4: Simplify right side
    122,991.48x = 7,358,199,510.06
  5. Step 5: Solve for x
    x = 7,358,199,510.06/122,991.48
  6. Step 6: Final answer
    x = 59,826.90

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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.