Home / 81,558.20-122,307.92-28,235.70

Finding the Fourth Proportional to 81,558.20, 122,307.92 and 28,235.70

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Solution

The fourth proportional to 81,558.20, 122,307.92 and 28,235.70 is: 42,343.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,558.20 : 122,307.92 = 28,235.70 : x
  2. Step 2: Convert to fraction form
    81,558.20/122,307.92 = 28,235.70/x
  3. Step 3: Cross multiply
    81,558.20x = 122,307.92 × 28,235.70
  4. Step 4: Simplify right side
    81,558.20x = 3,453,449,736.74
  5. Step 5: Solve for x
    x = 3,453,449,736.74/81,558.20
  6. Step 6: Final answer
    x = 42,343.38

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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.