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Finding the Fourth Proportional to 74,803.92, 103,228.83 and 40,811.91

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Solution

The fourth proportional to 74,803.92, 103,228.83 and 40,811.91 is: 56,320.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,803.92 : 103,228.83 = 40,811.91 : x
  2. Step 2: Convert to fraction form
    74,803.92/103,228.83 = 40,811.91/x
  3. Step 3: Cross multiply
    74,803.92x = 103,228.83 × 40,811.91
  4. Step 4: Simplify right side
    74,803.92x = 4,212,965,719.37
  5. Step 5: Solve for x
    x = 4,212,965,719.37/74,803.92
  6. Step 6: Final answer
    x = 56,320.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.