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Finding the Fourth Proportional to 85,561.35, 118,078.50 and 47,835.60

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Solution

The fourth proportional to 85,561.35, 118,078.50 and 47,835.60 is: 66,015.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,561.35 : 118,078.50 = 47,835.60 : x
  2. Step 2: Convert to fraction form
    85,561.35/118,078.50 = 47,835.60/x
  3. Step 3: Cross multiply
    85,561.35x = 118,078.50 × 47,835.60
  4. Step 4: Simplify right side
    85,561.35x = 5,648,355,894.60
  5. Step 5: Solve for x
    x = 5,648,355,894.60/85,561.35
  6. Step 6: Final answer
    x = 66,015.27

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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.