Home / 121,015.20-181,522.80-111,338.40

Finding the Fourth Proportional to 121,015.20, 181,522.80 and 111,338.40

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Solution

The fourth proportional to 121,015.20, 181,522.80 and 111,338.40 is: 167,007.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,015.20 : 181,522.80 = 111,338.40 : x
  2. Step 2: Convert to fraction form
    121,015.20/181,522.80 = 111,338.40/x
  3. Step 3: Cross multiply
    121,015.20x = 181,522.80 × 111,338.40
  4. Step 4: Simplify right side
    121,015.20x = 20,210,458,115.52
  5. Step 5: Solve for x
    x = 20,210,458,115.52/121,015.20
  6. Step 6: Final answer
    x = 167,007.60

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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.