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Finding the Fourth Proportional to 78,941.25, 109,027.22 and 61,250.85

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Solution

The fourth proportional to 78,941.25, 109,027.22 and 61,250.85 is: 84,594.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,941.25 : 109,027.22 = 61,250.85 : x
  2. Step 2: Convert to fraction form
    78,941.25/109,027.22 = 61,250.85/x
  3. Step 3: Cross multiply
    78,941.25x = 109,027.22 × 61,250.85
  4. Step 4: Simplify right side
    78,941.25x = 6,678,009,591.88
  5. Step 5: Solve for x
    x = 6,678,009,591.88/78,941.25
  6. Step 6: Final answer
    x = 84,594.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.