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Finding the Fourth Proportional to 108,927.64, 150,389.74 and 72,680.84

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Solution

The fourth proportional to 108,927.64, 150,389.74 and 72,680.84 is: 100,346.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,927.64 : 150,389.74 = 72,680.84 : x
  2. Step 2: Convert to fraction form
    108,927.64/150,389.74 = 72,680.84/x
  3. Step 3: Cross multiply
    108,927.64x = 150,389.74 × 72,680.84
  4. Step 4: Simplify right side
    108,927.64x = 10,930,453,174.97
  5. Step 5: Solve for x
    x = 10,930,453,174.97/108,927.64
  6. Step 6: Final answer
    x = 100,346.01

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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.