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Finding the Fourth Proportional to 108,368.10, 162,464.67 and 99,620.10

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Solution

The fourth proportional to 108,368.10, 162,464.67 and 99,620.10 is: 149,349.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,368.10 : 162,464.67 = 99,620.10 : x
  2. Step 2: Convert to fraction form
    108,368.10/162,464.67 = 99,620.10/x
  3. Step 3: Cross multiply
    108,368.10x = 162,464.67 × 99,620.10
  4. Step 4: Simplify right side
    108,368.10x = 16,184,746,671.87
  5. Step 5: Solve for x
    x = 16,184,746,671.87/108,368.10
  6. Step 6: Final answer
    x = 149,349.73

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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.