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Finding the Fourth Proportional to 65,796.58, 90,692.64 and 51,431.03

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Solution

The fourth proportional to 65,796.58, 90,692.64 and 51,431.03 is: 70,891.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,796.58 : 90,692.64 = 51,431.03 : x
  2. Step 2: Convert to fraction form
    65,796.58/90,692.64 = 51,431.03/x
  3. Step 3: Cross multiply
    65,796.58x = 90,692.64 × 51,431.03
  4. Step 4: Simplify right side
    65,796.58x = 4,664,415,888.62
  5. Step 5: Solve for x
    x = 4,664,415,888.62/65,796.58
  6. Step 6: Final answer
    x = 70,891.46

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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.