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Finding the Fourth Proportional to 77,765.20, 116,647.80 and 76,469.20

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Solution

The fourth proportional to 77,765.20, 116,647.80 and 76,469.20 is: 114,703.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,765.20 : 116,647.80 = 76,469.20 : x
  2. Step 2: Convert to fraction form
    77,765.20/116,647.80 = 76,469.20/x
  3. Step 3: Cross multiply
    77,765.20x = 116,647.80 × 76,469.20
  4. Step 4: Simplify right side
    77,765.20x = 8,919,963,947.76
  5. Step 5: Solve for x
    x = 8,919,963,947.76/77,765.20
  6. Step 6: Final answer
    x = 114,703.80

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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.