Home / 80,403.78-111,465.43-76,137.94

Finding the Fourth Proportional to 80,403.78, 111,465.43 and 76,137.94

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Solution

The fourth proportional to 80,403.78, 111,465.43 and 76,137.94 is: 105,551.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,403.78 : 111,465.43 = 76,137.94 : x
  2. Step 2: Convert to fraction form
    80,403.78/111,465.43 = 76,137.94/x
  3. Step 3: Cross multiply
    80,403.78x = 111,465.43 × 76,137.94
  4. Step 4: Simplify right side
    80,403.78x = 8,486,748,170.40
  5. Step 5: Solve for x
    x = 8,486,748,170.40/80,403.78
  6. Step 6: Final answer
    x = 105,551.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.