Home / 72,939.93-109,421.57-30,820.43

Finding the Fourth Proportional to 72,939.93, 109,421.57 and 30,820.43

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Solution

The fourth proportional to 72,939.93, 109,421.57 and 30,820.43 is: 46,235.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,939.93 : 109,421.57 = 30,820.43 : x
  2. Step 2: Convert to fraction form
    72,939.93/109,421.57 = 30,820.43/x
  3. Step 3: Cross multiply
    72,939.93x = 109,421.57 × 30,820.43
  4. Step 4: Simplify right side
    72,939.93x = 3,372,419,368.62
  5. Step 5: Solve for x
    x = 3,372,419,368.62/72,939.93
  6. Step 6: Final answer
    x = 46,235.57

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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.