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Finding the Fourth Proportional to 86,170.79, 118,915.68 and 50,390.86

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Solution

The fourth proportional to 86,170.79, 118,915.68 and 50,390.86 is: 69,539.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,170.79 : 118,915.68 = 50,390.86 : x
  2. Step 2: Convert to fraction form
    86,170.79/118,915.68 = 50,390.86/x
  3. Step 3: Cross multiply
    86,170.79x = 118,915.68 × 50,390.86
  4. Step 4: Simplify right side
    86,170.79x = 5,992,263,085.40
  5. Step 5: Solve for x
    x = 5,992,263,085.40/86,170.79
  6. Step 6: Final answer
    x = 69,539.38

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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.