Home / 80,934.78-121,328.21-28,315.56

Finding the Fourth Proportional to 80,934.78, 121,328.21 and 28,315.56

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Solution

The fourth proportional to 80,934.78, 121,328.21 and 28,315.56 is: 42,447.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,934.78 : 121,328.21 = 28,315.56 : x
  2. Step 2: Convert to fraction form
    80,934.78/121,328.21 = 28,315.56/x
  3. Step 3: Cross multiply
    80,934.78x = 121,328.21 × 28,315.56
  4. Step 4: Simplify right side
    80,934.78x = 3,435,476,068.37
  5. Step 5: Solve for x
    x = 3,435,476,068.37/80,934.78
  6. Step 6: Final answer
    x = 42,447.46

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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.