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Finding the Fourth Proportional to 108,114.60, 162,171.90 and 90,618.60

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Solution

The fourth proportional to 108,114.60, 162,171.90 and 90,618.60 is: 135,927.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,114.60 : 162,171.90 = 90,618.60 : x
  2. Step 2: Convert to fraction form
    108,114.60/162,171.90 = 90,618.60/x
  3. Step 3: Cross multiply
    108,114.60x = 162,171.90 × 90,618.60
  4. Step 4: Simplify right side
    108,114.60x = 14,695,790,537.34
  5. Step 5: Solve for x
    x = 14,695,790,537.34/108,114.60
  6. Step 6: Final answer
    x = 135,927.90

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1.5x scale

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.