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Finding the Fourth Proportional to 49,808.40, 74,712.60 and 18,639.60

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Solution

The fourth proportional to 49,808.40, 74,712.60 and 18,639.60 is: 27,959.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,808.40 : 74,712.60 = 18,639.60 : x
  2. Step 2: Convert to fraction form
    49,808.40/74,712.60 = 18,639.60/x
  3. Step 3: Cross multiply
    49,808.40x = 74,712.60 × 18,639.60
  4. Step 4: Simplify right side
    49,808.40x = 1,392,612,978.96
  5. Step 5: Solve for x
    x = 1,392,612,978.96/49,808.40
  6. Step 6: Final answer
    x = 27,959.40

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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.