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Finding the Fourth Proportional to 74,515, 111,772.77 and 70,777.66

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Solution

The fourth proportional to 74,515, 111,772.77 and 70,777.66 is: 106,166.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,515 : 111,772.77 = 70,777.66 : x
  2. Step 2: Convert to fraction form
    74,515/111,772.77 = 70,777.66/x
  3. Step 3: Cross multiply
    74,515x = 111,772.77 × 70,777.66
  4. Step 4: Simplify right side
    74,515x = 7,911,015,112.32
  5. Step 5: Solve for x
    x = 7,911,015,112.32/74,515
  6. Step 6: Final answer
    x = 106,166.75

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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.