Home / 72,934.21-109,419.77-20,343.66

Finding the Fourth Proportional to 72,934.21, 109,419.77 and 20,343.66

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Solution

The fourth proportional to 72,934.21, 109,419.77 and 20,343.66 is: 30,520.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,934.21 : 109,419.77 = 20,343.66 : x
  2. Step 2: Convert to fraction form
    72,934.21/109,419.77 = 20,343.66/x
  3. Step 3: Cross multiply
    72,934.21x = 109,419.77 × 20,343.66
  4. Step 4: Simplify right side
    72,934.21x = 2,225,998,598.16
  5. Step 5: Solve for x
    x = 2,225,998,598.16/72,934.21
  6. Step 6: Final answer
    x = 30,520.64

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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.