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Finding the Fourth Proportional to 73,390.65, 110,085.76 and 20,800.59

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Solution

The fourth proportional to 73,390.65, 110,085.76 and 20,800.59 is: 31,200.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,390.65 : 110,085.76 = 20,800.59 : x
  2. Step 2: Convert to fraction form
    73,390.65/110,085.76 = 20,800.59/x
  3. Step 3: Cross multiply
    73,390.65x = 110,085.76 × 20,800.59
  4. Step 4: Simplify right side
    73,390.65x = 2,289,848,758.60
  5. Step 5: Solve for x
    x = 2,289,848,758.60/73,390.65
  6. Step 6: Final answer
    x = 31,200.82

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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.