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Finding the Fourth Proportional to 77,114.40, 115,671.60 and 68,205.60

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Solution

The fourth proportional to 77,114.40, 115,671.60 and 68,205.60 is: 102,308.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,114.40 : 115,671.60 = 68,205.60 : x
  2. Step 2: Convert to fraction form
    77,114.40/115,671.60 = 68,205.60/x
  3. Step 3: Cross multiply
    77,114.40x = 115,671.60 × 68,205.60
  4. Step 4: Simplify right side
    77,114.40x = 7,889,450,880.96
  5. Step 5: Solve for x
    x = 7,889,450,880.96/77,114.40
  6. Step 6: Final answer
    x = 102,308.40

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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.