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Finding the Fourth Proportional to 78,865.40, 118,343.46 and 43,802.12

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Solution

The fourth proportional to 78,865.40, 118,343.46 and 43,802.12 is: 65,728.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,865.40 : 118,343.46 = 43,802.12 : x
  2. Step 2: Convert to fraction form
    78,865.40/118,343.46 = 43,802.12/x
  3. Step 3: Cross multiply
    78,865.40x = 118,343.46 × 43,802.12
  4. Step 4: Simplify right side
    78,865.40x = 5,183,694,436.14
  5. Step 5: Solve for x
    x = 5,183,694,436.14/78,865.40
  6. Step 6: Final answer
    x = 65,728.37

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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.