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Finding the Fourth Proportional to 75,121.80, 103,668.30 and 41,130.60

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Solution

The fourth proportional to 75,121.80, 103,668.30 and 41,130.60 is: 56,760.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,121.80 : 103,668.30 = 41,130.60 : x
  2. Step 2: Convert to fraction form
    75,121.80/103,668.30 = 41,130.60/x
  3. Step 3: Cross multiply
    75,121.80x = 103,668.30 × 41,130.60
  4. Step 4: Simplify right side
    75,121.80x = 4,263,939,379.98
  5. Step 5: Solve for x
    x = 4,263,939,379.98/75,121.80
  6. Step 6: Final answer
    x = 56,760.35

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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.