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Finding the Fourth Proportional to 87,628.80, 122,913.60 and 87,628.80

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Solution

The fourth proportional to 87,628.80, 122,913.60 and 87,628.80 is: 122,913.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,628.80 : 122,913.60 = 87,628.80 : x
  2. Step 2: Convert to fraction form
    87,628.80/122,913.60 = 87,628.80/x
  3. Step 3: Cross multiply
    87,628.80x = 122,913.60 × 87,628.80
  4. Step 4: Simplify right side
    87,628.80x = 10,770,771,271.68
  5. Step 5: Solve for x
    x = 10,770,771,271.68/87,628.80
  6. Step 6: Final answer
    x = 122,913.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.