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Finding the Fourth Proportional to 121,271.80, 181,907.70 and 112,523.80

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Solution

The fourth proportional to 121,271.80, 181,907.70 and 112,523.80 is: 168,785.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,271.80 : 181,907.70 = 112,523.80 : x
  2. Step 2: Convert to fraction form
    121,271.80/181,907.70 = 112,523.80/x
  3. Step 3: Cross multiply
    121,271.80x = 181,907.70 × 112,523.80
  4. Step 4: Simplify right side
    121,271.80x = 20,468,945,653.26
  5. Step 5: Solve for x
    x = 20,468,945,653.26/121,271.80
  6. Step 6: Final answer
    x = 168,785.70

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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.