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Finding the Fourth Proportional to 207,038.07, 310,521.87 and 66,796.70

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Solution

The fourth proportional to 207,038.07, 310,521.87 and 66,796.70 is: 100,183.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,038.07 : 310,521.87 = 66,796.70 : x
  2. Step 2: Convert to fraction form
    207,038.07/310,521.87 = 66,796.70/x
  3. Step 3: Cross multiply
    207,038.07x = 310,521.87 × 66,796.70
  4. Step 4: Simplify right side
    207,038.07x = 20,741,834,641.22
  5. Step 5: Solve for x
    x = 20,741,834,641.22/207,038.07
  6. Step 6: Final answer
    x = 100,183.67

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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.