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Finding the Fourth Proportional to 74,517, 111,775.78 and 70,779.66

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Solution

The fourth proportional to 74,517, 111,775.78 and 70,779.66 is: 106,169.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,517 : 111,775.78 = 70,779.66 : x
  2. Step 2: Convert to fraction form
    74,517/111,775.78 = 70,779.66/x
  3. Step 3: Cross multiply
    74,517x = 111,775.78 × 70,779.66
  4. Step 4: Simplify right side
    74,517x = 7,911,451,704.63
  5. Step 5: Solve for x
    x = 7,911,451,704.63/74,517
  6. Step 6: Final answer
    x = 106,169.76

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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.