Home / 120,028.42-180,042.69-31,281.70

Finding the Fourth Proportional to 120,028.42, 180,042.69 and 31,281.70

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Solution

The fourth proportional to 120,028.42, 180,042.69 and 31,281.70 is: 46,922.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,028.42 : 180,042.69 = 31,281.70 : x
  2. Step 2: Convert to fraction form
    120,028.42/180,042.69 = 31,281.70/x
  3. Step 3: Cross multiply
    120,028.42x = 180,042.69 × 31,281.70
  4. Step 4: Simplify right side
    120,028.42x = 5,632,041,415.77
  5. Step 5: Solve for x
    x = 5,632,041,415.77/120,028.42
  6. Step 6: Final answer
    x = 46,922.57

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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.