Home / 85,912.68-118,290.06-78,039.48

Finding the Fourth Proportional to 85,912.68, 118,290.06 and 78,039.48

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Solution

The fourth proportional to 85,912.68, 118,290.06 and 78,039.48 is: 107,449.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,912.68 : 118,290.06 = 78,039.48 : x
  2. Step 2: Convert to fraction form
    85,912.68/118,290.06 = 78,039.48/x
  3. Step 3: Cross multiply
    85,912.68x = 118,290.06 × 78,039.48
  4. Step 4: Simplify right side
    85,912.68x = 9,231,294,771.57
  5. Step 5: Solve for x
    x = 9,231,294,771.57/85,912.68
  6. Step 6: Final answer
    x = 107,449.74

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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.