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Finding the Fourth Proportional to 74,356.84, 102,608.94 and 40,364.56

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Solution

The fourth proportional to 74,356.84, 102,608.94 and 40,364.56 is: 55,701.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,356.84 : 102,608.94 = 40,364.56 : x
  2. Step 2: Convert to fraction form
    74,356.84/102,608.94 = 40,364.56/x
  3. Step 3: Cross multiply
    74,356.84x = 102,608.94 × 40,364.56
  4. Step 4: Simplify right side
    74,356.84x = 4,141,764,715.17
  5. Step 5: Solve for x
    x = 4,141,764,715.17/74,356.84
  6. Step 6: Final answer
    x = 55,701.19

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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.