Home / 107,978.41-149,000.86-69,739.62

Finding the Fourth Proportional to 107,978.41, 149,000.86 and 69,739.62

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Solution

The fourth proportional to 107,978.41, 149,000.86 and 69,739.62 is: 96,234.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,978.41 : 149,000.86 = 69,739.62 : x
  2. Step 2: Convert to fraction form
    107,978.41/149,000.86 = 69,739.62/x
  3. Step 3: Cross multiply
    107,978.41x = 149,000.86 × 69,739.62
  4. Step 4: Simplify right side
    107,978.41x = 10,391,263,356.07
  5. Step 5: Solve for x
    x = 10,391,263,356.07/107,978.41
  6. Step 6: Final answer
    x = 96,234.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.