Home / 121,112.40-181,668.60-90,008.40

Finding the Fourth Proportional to 121,112.40, 181,668.60 and 90,008.40

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Solution

The fourth proportional to 121,112.40, 181,668.60 and 90,008.40 is: 135,012.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,112.40 : 181,668.60 = 90,008.40 : x
  2. Step 2: Convert to fraction form
    121,112.40/181,668.60 = 90,008.40/x
  3. Step 3: Cross multiply
    121,112.40x = 181,668.60 × 90,008.40
  4. Step 4: Simplify right side
    121,112.40x = 16,351,700,016.24
  5. Step 5: Solve for x
    x = 16,351,700,016.24/121,112.40
  6. Step 6: Final answer
    x = 135,012.60

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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.