Home / 80,912.40-121,368.60-52,918.80

Finding the Fourth Proportional to 80,912.40, 121,368.60 and 52,918.80

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Solution

The fourth proportional to 80,912.40, 121,368.60 and 52,918.80 is: 79,378.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,912.40 : 121,368.60 = 52,918.80 : x
  2. Step 2: Convert to fraction form
    80,912.40/121,368.60 = 52,918.80/x
  3. Step 3: Cross multiply
    80,912.40x = 121,368.60 × 52,918.80
  4. Step 4: Simplify right side
    80,912.40x = 6,422,680,669.68
  5. Step 5: Solve for x
    x = 6,422,680,669.68/80,912.40
  6. Step 6: Final answer
    x = 79,378.20

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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.