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Finding the Fourth Proportional to 74,643.73, 103,006.79 and 40,652.81

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Solution

The fourth proportional to 74,643.73, 103,006.79 and 40,652.81 is: 56,100.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,643.73 : 103,006.79 = 40,652.81 : x
  2. Step 2: Convert to fraction form
    74,643.73/103,006.79 = 40,652.81/x
  3. Step 3: Cross multiply
    74,643.73x = 103,006.79 × 40,652.81
  4. Step 4: Simplify right side
    74,643.73x = 4,187,515,572.71
  5. Step 5: Solve for x
    x = 4,187,515,572.71/74,643.73
  6. Step 6: Final answer
    x = 56,100.03

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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.