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Finding the Fourth Proportional to 74,641.82, 103,004.99 and 40,650.87

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Solution

The fourth proportional to 74,641.82, 103,004.99 and 40,650.87 is: 56,097.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,641.82 : 103,004.99 = 40,650.87 : x
  2. Step 2: Convert to fraction form
    74,641.82/103,004.99 = 40,650.87/x
  3. Step 3: Cross multiply
    74,641.82x = 103,004.99 × 40,650.87
  4. Step 4: Simplify right side
    74,641.82x = 4,187,242,407.03
  5. Step 5: Solve for x
    x = 4,187,242,407.03/74,641.82
  6. Step 6: Final answer
    x = 56,097.81

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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.