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Finding the Fourth Proportional to 100,467.56, 138,621.37 and 56,860.67

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Solution

The fourth proportional to 100,467.56, 138,621.37 and 56,860.67 is: 78,454.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,467.56 : 138,621.37 = 56,860.67 : x
  2. Step 2: Convert to fraction form
    100,467.56/138,621.37 = 56,860.67/x
  3. Step 3: Cross multiply
    100,467.56x = 138,621.37 × 56,860.67
  4. Step 4: Simplify right side
    100,467.56x = 7,882,104,230.53
  5. Step 5: Solve for x
    x = 7,882,104,230.53/100,467.56
  6. Step 6: Final answer
    x = 78,454.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.