Home / 103,629.15-155,443.73-78,745.95

Finding the Fourth Proportional to 103,629.15, 155,443.73 and 78,745.95

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Solution

The fourth proportional to 103,629.15, 155,443.73 and 78,745.95 is: 118,118.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,629.15 : 155,443.73 = 78,745.95 : x
  2. Step 2: Convert to fraction form
    103,629.15/155,443.73 = 78,745.95/x
  3. Step 3: Cross multiply
    103,629.15x = 155,443.73 × 78,745.95
  4. Step 4: Simplify right side
    103,629.15x = 12,240,563,796.66
  5. Step 5: Solve for x
    x = 12,240,563,796.66/103,629.15
  6. Step 6: Final answer
    x = 118,118.93

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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.