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Finding the Fourth Proportional to 69,771.60, 103,918.59 and 69,431.70

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Solution

The fourth proportional to 69,771.60, 103,918.59 and 69,431.70 is: 103,412.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,771.60 : 103,918.59 = 69,431.70 : x
  2. Step 2: Convert to fraction form
    69,771.60/103,918.59 = 69,431.70/x
  3. Step 3: Cross multiply
    69,771.60x = 103,918.59 × 69,431.70
  4. Step 4: Simplify right side
    69,771.60x = 7,215,244,365.30
  5. Step 5: Solve for x
    x = 7,215,244,365.30/69,771.60
  6. Step 6: Final answer
    x = 103,412.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.