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Finding the Fourth Proportional to 79,620.31, 109,880.68 and 45,639.32

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Solution

The fourth proportional to 79,620.31, 109,880.68 and 45,639.32 is: 62,984.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,620.31 : 109,880.68 = 45,639.32 : x
  2. Step 2: Convert to fraction form
    79,620.31/109,880.68 = 45,639.32/x
  3. Step 3: Cross multiply
    79,620.31x = 109,880.68 × 45,639.32
  4. Step 4: Simplify right side
    79,620.31x = 5,014,879,676.94
  5. Step 5: Solve for x
    x = 5,014,879,676.94/79,620.31
  6. Step 6: Final answer
    x = 62,984.93

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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.