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Finding the Fourth Proportional to 108,008.40, 162,012.60 and 68,739.60

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Solution

The fourth proportional to 108,008.40, 162,012.60 and 68,739.60 is: 103,109.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,008.40 : 162,012.60 = 68,739.60 : x
  2. Step 2: Convert to fraction form
    108,008.40/162,012.60 = 68,739.60/x
  3. Step 3: Cross multiply
    108,008.40x = 162,012.60 × 68,739.60
  4. Step 4: Simplify right side
    108,008.40x = 11,136,681,318.96
  5. Step 5: Solve for x
    x = 11,136,681,318.96/108,008.40
  6. Step 6: Final answer
    x = 103,109.40

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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.