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Finding the Fourth Proportional to 74,975.83, 103,477.91 and 43,138.58

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Solution

The fourth proportional to 74,975.83, 103,477.91 and 43,138.58 is: 59,537.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,975.83 : 103,477.91 = 43,138.58 : x
  2. Step 2: Convert to fraction form
    74,975.83/103,477.91 = 43,138.58/x
  3. Step 3: Cross multiply
    74,975.83x = 103,477.91 × 43,138.58
  4. Step 4: Simplify right side
    74,975.83x = 4,463,889,365.69
  5. Step 5: Solve for x
    x = 4,463,889,365.69/74,975.83
  6. Step 6: Final answer
    x = 59,537.71

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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.