Home / 66,279.85-91,435.97-39,407.09

Finding the Fourth Proportional to 66,279.85, 91,435.97 and 39,407.09

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Solution

The fourth proportional to 66,279.85, 91,435.97 and 39,407.09 is: 54,363.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,279.85 : 91,435.97 = 39,407.09 : x
  2. Step 2: Convert to fraction form
    66,279.85/91,435.97 = 39,407.09/x
  3. Step 3: Cross multiply
    66,279.85x = 91,435.97 × 39,407.09
  4. Step 4: Simplify right side
    66,279.85x = 3,603,225,140.37
  5. Step 5: Solve for x
    x = 3,603,225,140.37/66,279.85
  6. Step 6: Final answer
    x = 54,363.81

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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.