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Finding the Fourth Proportional to 109,645.80, 164,474.10 and 57,157.80

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Solution

The fourth proportional to 109,645.80, 164,474.10 and 57,157.80 is: 85,739.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,645.80 : 164,474.10 = 57,157.80 : x
  2. Step 2: Convert to fraction form
    109,645.80/164,474.10 = 57,157.80/x
  3. Step 3: Cross multiply
    109,645.80x = 164,474.10 × 57,157.80
  4. Step 4: Simplify right side
    109,645.80x = 9,400,977,712.98
  5. Step 5: Solve for x
    x = 9,400,977,712.98/109,645.80
  6. Step 6: Final answer
    x = 85,739.51

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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.