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Finding the Fourth Proportional to 74,608.81, 102,959.13 and 40,617.59

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Solution

The fourth proportional to 74,608.81, 102,959.13 and 40,617.59 is: 56,051.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,608.81 : 102,959.13 = 40,617.59 : x
  2. Step 2: Convert to fraction form
    74,608.81/102,959.13 = 40,617.59/x
  3. Step 3: Cross multiply
    74,608.81x = 102,959.13 × 40,617.59
  4. Step 4: Simplify right side
    74,608.81x = 4,181,951,366.62
  5. Step 5: Solve for x
    x = 4,181,951,366.62/74,608.81
  6. Step 6: Final answer
    x = 56,051.71

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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.