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Finding the Fourth Proportional to 108,289.32, 162,482.46 and 68,836.20

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Solution

The fourth proportional to 108,289.32, 162,482.46 and 68,836.20 is: 103,285.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,289.32 : 162,482.46 = 68,836.20 : x
  2. Step 2: Convert to fraction form
    108,289.32/162,482.46 = 68,836.20/x
  3. Step 3: Cross multiply
    108,289.32x = 162,482.46 × 68,836.20
  4. Step 4: Simplify right side
    108,289.32x = 11,184,675,113.05
  5. Step 5: Solve for x
    x = 11,184,675,113.05/108,289.32
  6. Step 6: Final answer
    x = 103,285.12

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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.