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Finding the Fourth Proportional to 121,008.60, 181,512.90 and 71,112.60

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Solution

The fourth proportional to 121,008.60, 181,512.90 and 71,112.60 is: 106,668.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,008.60 : 181,512.90 = 71,112.60 : x
  2. Step 2: Convert to fraction form
    121,008.60/181,512.90 = 71,112.60/x
  3. Step 3: Cross multiply
    121,008.60x = 181,512.90 × 71,112.60
  4. Step 4: Simplify right side
    121,008.60x = 12,907,854,252.54
  5. Step 5: Solve for x
    x = 12,907,854,252.54/121,008.60
  6. Step 6: Final answer
    x = 106,668.90

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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.