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Finding the Fourth Proportional to 85,709.44, 118,239.74 and 55,504.50

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Solution

The fourth proportional to 85,709.44, 118,239.74 and 55,504.50 is: 76,570.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,709.44 : 118,239.74 = 55,504.50 : x
  2. Step 2: Convert to fraction form
    85,709.44/118,239.74 = 55,504.50/x
  3. Step 3: Cross multiply
    85,709.44x = 118,239.74 × 55,504.50
  4. Step 4: Simplify right side
    85,709.44x = 6,562,837,648.83
  5. Step 5: Solve for x
    x = 6,562,837,648.83/85,709.44
  6. Step 6: Final answer
    x = 76,570.77

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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.