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Finding the Fourth Proportional to 77,783.40, 116,415.90 and 68,452.20

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Solution

The fourth proportional to 77,783.40, 116,415.90 and 68,452.20 is: 102,450.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,783.40 : 116,415.90 = 68,452.20 : x
  2. Step 2: Convert to fraction form
    77,783.40/116,415.90 = 68,452.20/x
  3. Step 3: Cross multiply
    77,783.40x = 116,415.90 × 68,452.20
  4. Step 4: Simplify right side
    77,783.40x = 7,968,924,469.98
  5. Step 5: Solve for x
    x = 7,968,924,469.98/77,783.40
  6. Step 6: Final answer
    x = 102,450.19

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1.5x scale

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.