Home / 80,748.87-121,131.37-30,870.92

Finding the Fourth Proportional to 80,748.87, 121,131.37 and 30,870.92

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Solution

The fourth proportional to 80,748.87, 121,131.37 and 30,870.92 is: 46,309.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,748.87 : 121,131.37 = 30,870.92 : x
  2. Step 2: Convert to fraction form
    80,748.87/121,131.37 = 30,870.92/x
  3. Step 3: Cross multiply
    80,748.87x = 121,131.37 × 30,870.92
  4. Step 4: Simplify right side
    80,748.87x = 3,739,437,000.53
  5. Step 5: Solve for x
    x = 3,739,437,000.53/80,748.87
  6. Step 6: Final answer
    x = 46,309.47

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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.