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Finding the Fourth Proportional to 73,143.16, 109,760.65 and 28,768.71

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Solution

The fourth proportional to 73,143.16, 109,760.65 and 28,768.71 is: 43,171.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,143.16 : 109,760.65 = 28,768.71 : x
  2. Step 2: Convert to fraction form
    73,143.16/109,760.65 = 28,768.71/x
  3. Step 3: Cross multiply
    73,143.16x = 109,760.65 × 28,768.71
  4. Step 4: Simplify right side
    73,143.16x = 3,157,672,309.26
  5. Step 5: Solve for x
    x = 3,157,672,309.26/73,143.16
  6. Step 6: Final answer
    x = 43,171.12

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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.