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Finding the Fourth Proportional to 78,436.46, 117,657.46 and 25,121.50

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Solution

The fourth proportional to 78,436.46, 117,657.46 and 25,121.50 is: 37,683.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,436.46 : 117,657.46 = 25,121.50 : x
  2. Step 2: Convert to fraction form
    78,436.46/117,657.46 = 25,121.50/x
  3. Step 3: Cross multiply
    78,436.46x = 117,657.46 × 25,121.50
  4. Step 4: Simplify right side
    78,436.46x = 2,955,731,524.44
  5. Step 5: Solve for x
    x = 2,955,731,524.44/78,436.46
  6. Step 6: Final answer
    x = 37,683.13

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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.