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Finding the Fourth Proportional to 78,786.60, 118,190.70 and 26,190.60

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Solution

The fourth proportional to 78,786.60, 118,190.70 and 26,190.60 is: 39,289.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,786.60 : 118,190.70 = 26,190.60 : x
  2. Step 2: Convert to fraction form
    78,786.60/118,190.70 = 26,190.60/x
  3. Step 3: Cross multiply
    78,786.60x = 118,190.70 × 26,190.60
  4. Step 4: Simplify right side
    78,786.60x = 3,095,485,347.42
  5. Step 5: Solve for x
    x = 3,095,485,347.42/78,786.60
  6. Step 6: Final answer
    x = 39,289.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.