Home / 81,271.40-121,907.10-73,106.60

Finding the Fourth Proportional to 81,271.40, 121,907.10 and 73,106.60

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Solution

The fourth proportional to 81,271.40, 121,907.10 and 73,106.60 is: 109,659.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,271.40 : 121,907.10 = 73,106.60 : x
  2. Step 2: Convert to fraction form
    81,271.40/121,907.10 = 73,106.60/x
  3. Step 3: Cross multiply
    81,271.40x = 121,907.10 × 73,106.60
  4. Step 4: Simplify right side
    81,271.40x = 8,912,213,596.86
  5. Step 5: Solve for x
    x = 8,912,213,596.86/81,271.40
  6. Step 6: Final answer
    x = 109,659.90

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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.