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Finding the Fourth Proportional to 124,571.76, 171,931.32 and 74,274

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Solution

The fourth proportional to 124,571.76, 171,931.32 and 74,274 is: 102,511.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,571.76 : 171,931.32 = 74,274 : x
  2. Step 2: Convert to fraction form
    124,571.76/171,931.32 = 74,274/x
  3. Step 3: Cross multiply
    124,571.76x = 171,931.32 × 74,274
  4. Step 4: Simplify right side
    124,571.76x = 12,770,026,861.68
  5. Step 5: Solve for x
    x = 12,770,026,861.68/124,571.76
  6. Step 6: Final answer
    x = 102,511.41

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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.