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Finding the Fourth Proportional to 69,771.60, 104,657.40 and 28,218.60

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Solution

The fourth proportional to 69,771.60, 104,657.40 and 28,218.60 is: 42,327.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,771.60 : 104,657.40 = 28,218.60 : x
  2. Step 2: Convert to fraction form
    69,771.60/104,657.40 = 28,218.60/x
  3. Step 3: Cross multiply
    69,771.60x = 104,657.40 × 28,218.60
  4. Step 4: Simplify right side
    69,771.60x = 2,953,285,307.64
  5. Step 5: Solve for x
    x = 2,953,285,307.64/69,771.60
  6. Step 6: Final answer
    x = 42,327.90

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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.