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Finding the Fourth Proportional to 78,636.28, 117,955.32 and 43,797.28

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Solution

The fourth proportional to 78,636.28, 117,955.32 and 43,797.28 is: 65,696.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,636.28 : 117,955.32 = 43,797.28 : x
  2. Step 2: Convert to fraction form
    78,636.28/117,955.32 = 43,797.28/x
  3. Step 3: Cross multiply
    78,636.28x = 117,955.32 × 43,797.28
  4. Step 4: Simplify right side
    78,636.28x = 5,166,122,177.53
  5. Step 5: Solve for x
    x = 5,166,122,177.53/78,636.28
  6. Step 6: Final answer
    x = 65,696.42

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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.