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Finding the Fourth Proportional to 101,427.80, 152,163.30 and 31,314.20

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Solution

The fourth proportional to 101,427.80, 152,163.30 and 31,314.20 is: 46,977.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,427.80 : 152,163.30 = 31,314.20 : x
  2. Step 2: Convert to fraction form
    101,427.80/152,163.30 = 31,314.20/x
  3. Step 3: Cross multiply
    101,427.80x = 152,163.30 × 31,314.20
  4. Step 4: Simplify right side
    101,427.80x = 4,764,872,008.86
  5. Step 5: Solve for x
    x = 4,764,872,008.86/101,427.80
  6. Step 6: Final answer
    x = 46,977.97

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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.