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Finding the Fourth Proportional to 162,419.40, 243,629.10 and 136,758.60

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Solution

The fourth proportional to 162,419.40, 243,629.10 and 136,758.60 is: 205,137.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,419.40 : 243,629.10 = 136,758.60 : x
  2. Step 2: Convert to fraction form
    162,419.40/243,629.10 = 136,758.60/x
  3. Step 3: Cross multiply
    162,419.40x = 243,629.10 × 136,758.60
  4. Step 4: Simplify right side
    162,419.40x = 33,318,374,635.26
  5. Step 5: Solve for x
    x = 33,318,374,635.26/162,419.40
  6. Step 6: Final answer
    x = 205,137.90

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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.