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Finding the Fourth Proportional to 49,698, 74,501.64 and 45,369.36

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Solution

The fourth proportional to 49,698, 74,501.64 and 45,369.36 is: 68,012.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,698 : 74,501.64 = 45,369.36 : x
  2. Step 2: Convert to fraction form
    49,698/74,501.64 = 45,369.36/x
  3. Step 3: Cross multiply
    49,698x = 74,501.64 × 45,369.36
  4. Step 4: Simplify right side
    49,698x = 3,380,091,725.75
  5. Step 5: Solve for x
    x = 3,380,091,725.75/49,698
  6. Step 6: Final answer
    x = 68,012.63

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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.