Home / 90,769.20-136,056.60-40,840.80

Finding the Fourth Proportional to 90,769.20, 136,056.60 and 40,840.80

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Solution

The fourth proportional to 90,769.20, 136,056.60 and 40,840.80 is: 61,217.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,769.20 : 136,056.60 = 40,840.80 : x
  2. Step 2: Convert to fraction form
    90,769.20/136,056.60 = 40,840.80/x
  3. Step 3: Cross multiply
    90,769.20x = 136,056.60 × 40,840.80
  4. Step 4: Simplify right side
    90,769.20x = 5,556,660,389.28
  5. Step 5: Solve for x
    x = 5,556,660,389.28/90,769.20
  6. Step 6: Final answer
    x = 61,217.47

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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.