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Finding the Fourth Proportional to 100,618.32, 150,537.24 and 72,602.88

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Solution

The fourth proportional to 100,618.32, 150,537.24 and 72,602.88 is: 108,622.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,618.32 : 150,537.24 = 72,602.88 : x
  2. Step 2: Convert to fraction form
    100,618.32/150,537.24 = 72,602.88/x
  3. Step 3: Cross multiply
    100,618.32x = 150,537.24 × 72,602.88
  4. Step 4: Simplify right side
    100,618.32x = 10,929,437,171.25
  5. Step 5: Solve for x
    x = 10,929,437,171.25/100,618.32
  6. Step 6: Final answer
    x = 108,622.74

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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.