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Finding the Fourth Proportional to 78,611.98, 117,924.81 and 25,309.32

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Solution

The fourth proportional to 78,611.98, 117,924.81 and 25,309.32 is: 37,966.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,611.98 : 117,924.81 = 25,309.32 : x
  2. Step 2: Convert to fraction form
    78,611.98/117,924.81 = 25,309.32/x
  3. Step 3: Cross multiply
    78,611.98x = 117,924.81 × 25,309.32
  4. Step 4: Simplify right side
    78,611.98x = 2,984,597,099.54
  5. Step 5: Solve for x
    x = 2,984,597,099.54/78,611.98
  6. Step 6: Final answer
    x = 37,966.19

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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.