Home / 72,771.24-109,133.64-28,387.20

Finding the Fourth Proportional to 72,771.24, 109,133.64 and 28,387.20

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Solution

The fourth proportional to 72,771.24, 109,133.64 and 28,387.20 is: 42,571.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,771.24 : 109,133.64 = 28,387.20 : x
  2. Step 2: Convert to fraction form
    72,771.24/109,133.64 = 28,387.20/x
  3. Step 3: Cross multiply
    72,771.24x = 109,133.64 × 28,387.20
  4. Step 4: Simplify right side
    72,771.24x = 3,097,998,465.41
  5. Step 5: Solve for x
    x = 3,097,998,465.41/72,771.24
  6. Step 6: Final answer
    x = 42,571.74

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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.