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Finding the Fourth Proportional to 73,118.76, 109,723.26 and 28,737.72

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Solution

The fourth proportional to 73,118.76, 109,723.26 and 28,737.72 is: 43,124.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,118.76 : 109,723.26 = 28,737.72 : x
  2. Step 2: Convert to fraction form
    73,118.76/109,723.26 = 28,737.72/x
  3. Step 3: Cross multiply
    73,118.76x = 109,723.26 × 28,737.72
  4. Step 4: Simplify right side
    73,118.76x = 3,153,196,323.37
  5. Step 5: Solve for x
    x = 3,153,196,323.37/73,118.76
  6. Step 6: Final answer
    x = 43,124.31

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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.