Home / 280,132.55-420,200.37-69,770.50

Finding the Fourth Proportional to 280,132.55, 420,200.37 and 69,770.50

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Solution

The fourth proportional to 280,132.55, 420,200.37 and 69,770.50 is: 104,656.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,132.55 : 420,200.37 = 69,770.50 : x
  2. Step 2: Convert to fraction form
    280,132.55/420,200.37 = 69,770.50/x
  3. Step 3: Cross multiply
    280,132.55x = 420,200.37 × 69,770.50
  4. Step 4: Simplify right side
    280,132.55x = 29,317,589,915.09
  5. Step 5: Solve for x
    x = 29,317,589,915.09/280,132.55
  6. Step 6: Final answer
    x = 104,656.13

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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.