Home / 78,219.20-117,069.60-71,998.40

Finding the Fourth Proportional to 78,219.20, 117,069.60 and 71,998.40

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Solution

The fourth proportional to 78,219.20, 117,069.60 and 71,998.40 is: 107,759.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,219.20 : 117,069.60 = 71,998.40 : x
  2. Step 2: Convert to fraction form
    78,219.20/117,069.60 = 71,998.40/x
  3. Step 3: Cross multiply
    78,219.20x = 117,069.60 × 71,998.40
  4. Step 4: Simplify right side
    78,219.20x = 8,428,823,888.64
  5. Step 5: Solve for x
    x = 8,428,823,888.64/78,219.20
  6. Step 6: Final answer
    x = 107,759.01

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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.