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Finding the Fourth Proportional to 81,343.93, 121,970.62 and 25,168.41

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Solution

The fourth proportional to 81,343.93, 121,970.62 and 25,168.41 is: 37,738.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,343.93 : 121,970.62 = 25,168.41 : x
  2. Step 2: Convert to fraction form
    81,343.93/121,970.62 = 25,168.41/x
  3. Step 3: Cross multiply
    81,343.93x = 121,970.62 × 25,168.41
  4. Step 4: Simplify right side
    81,343.93x = 3,069,806,572.11
  5. Step 5: Solve for x
    x = 3,069,806,572.11/81,343.93
  6. Step 6: Final answer
    x = 37,738.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.