Home / 131,409.20-197,113.80-121,271.60

Finding the Fourth Proportional to 131,409.20, 197,113.80 and 121,271.60

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Solution

The fourth proportional to 131,409.20, 197,113.80 and 121,271.60 is: 181,907.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,409.20 : 197,113.80 = 121,271.60 : x
  2. Step 2: Convert to fraction form
    131,409.20/197,113.80 = 121,271.60/x
  3. Step 3: Cross multiply
    131,409.20x = 197,113.80 × 121,271.60
  4. Step 4: Simplify right side
    131,409.20x = 23,904,305,908.08
  5. Step 5: Solve for x
    x = 23,904,305,908.08/131,409.20
  6. Step 6: Final answer
    x = 181,907.40

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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.