Home / 105,125.45-145,074.20-57,379.59

Finding the Fourth Proportional to 105,125.45, 145,074.20 and 57,379.59

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Solution

The fourth proportional to 105,125.45, 145,074.20 and 57,379.59 is: 79,184.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,125.45 : 145,074.20 = 57,379.59 : x
  2. Step 2: Convert to fraction form
    105,125.45/145,074.20 = 57,379.59/x
  3. Step 3: Cross multiply
    105,125.45x = 145,074.20 × 57,379.59
  4. Step 4: Simplify right side
    105,125.45x = 8,324,297,828.68
  5. Step 5: Solve for x
    x = 8,324,297,828.68/105,125.45
  6. Step 6: Final answer
    x = 79,184.42

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1.5x scale

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.