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Finding the Fourth Proportional to 74,356.92, 102,217.97 and 63,970.71

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Solution

The fourth proportional to 74,356.92, 102,217.97 and 63,970.71 is: 87,940.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,356.92 : 102,217.97 = 63,970.71 : x
  2. Step 2: Convert to fraction form
    74,356.92/102,217.97 = 63,970.71/x
  3. Step 3: Cross multiply
    74,356.92x = 102,217.97 × 63,970.71
  4. Step 4: Simplify right side
    74,356.92x = 6,538,955,795.81
  5. Step 5: Solve for x
    x = 6,538,955,795.81/74,356.92
  6. Step 6: Final answer
    x = 87,940.11

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.