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Finding the Fourth Proportional to 65,692.56, 90,662.40 and 38,843.76

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Solution

The fourth proportional to 65,692.56, 90,662.40 and 38,843.76 is: 53,608.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,692.56 : 90,662.40 = 38,843.76 : x
  2. Step 2: Convert to fraction form
    65,692.56/90,662.40 = 38,843.76/x
  3. Step 3: Cross multiply
    65,692.56x = 90,662.40 × 38,843.76
  4. Step 4: Simplify right side
    65,692.56x = 3,521,668,506.62
  5. Step 5: Solve for x
    x = 3,521,668,506.62/65,692.56
  6. Step 6: Final answer
    x = 53,608.33

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1.5x scale

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.