Home / 80,877.69-121,317.75-28,288.85

Finding the Fourth Proportional to 80,877.69, 121,317.75 and 28,288.85

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Solution

The fourth proportional to 80,877.69, 121,317.75 and 28,288.85 is: 42,433.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,877.69 : 121,317.75 = 28,288.85 : x
  2. Step 2: Convert to fraction form
    80,877.69/121,317.75 = 28,288.85/x
  3. Step 3: Cross multiply
    80,877.69x = 121,317.75 × 28,288.85
  4. Step 4: Simplify right side
    80,877.69x = 3,431,939,025.50
  5. Step 5: Solve for x
    x = 3,431,939,025.50/80,877.69
  6. Step 6: Final answer
    x = 42,433.69

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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.