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Finding the Fourth Proportional to 101,989.85, 140,745.53 and 56,675.21

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Solution

The fourth proportional to 101,989.85, 140,745.53 and 56,675.21 is: 78,211.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,989.85 : 140,745.53 = 56,675.21 : x
  2. Step 2: Convert to fraction form
    101,989.85/140,745.53 = 56,675.21/x
  3. Step 3: Cross multiply
    101,989.85x = 140,745.53 × 56,675.21
  4. Step 4: Simplify right side
    101,989.85x = 7,976,781,907.27
  5. Step 5: Solve for x
    x = 7,976,781,907.27/101,989.85
  6. Step 6: Final answer
    x = 78,211.53

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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.