Home / 105,620.85-145,755.79-57,221.66

Finding the Fourth Proportional to 105,620.85, 145,755.79 and 57,221.66

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Solution

The fourth proportional to 105,620.85, 145,755.79 and 57,221.66 is: 78,965.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,620.85 : 145,755.79 = 57,221.66 : x
  2. Step 2: Convert to fraction form
    105,620.85/145,755.79 = 57,221.66/x
  3. Step 3: Cross multiply
    105,620.85x = 145,755.79 × 57,221.66
  4. Step 4: Simplify right side
    105,620.85x = 8,340,388,479.75
  5. Step 5: Solve for x
    x = 8,340,388,479.75/105,620.85
  6. Step 6: Final answer
    x = 78,965.36

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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.