Home / 80,907.85-121,415.76-28,317.34

Finding the Fourth Proportional to 80,907.85, 121,415.76 and 28,317.34

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Solution

The fourth proportional to 80,907.85, 121,415.76 and 28,317.34 is: 42,494.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,907.85 : 121,415.76 = 28,317.34 : x
  2. Step 2: Convert to fraction form
    80,907.85/121,415.76 = 28,317.34/x
  3. Step 3: Cross multiply
    80,907.85x = 121,415.76 × 28,317.34
  4. Step 4: Simplify right side
    80,907.85x = 3,438,171,357.28
  5. Step 5: Solve for x
    x = 3,438,171,357.28/80,907.85
  6. Step 6: Final answer
    x = 42,494.90

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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.