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Finding the Fourth Proportional to 268,170.60, 402,137.10 and 90,629.40

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Solution

The fourth proportional to 268,170.60, 402,137.10 and 90,629.40 is: 135,903.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,170.60 : 402,137.10 = 90,629.40 : x
  2. Step 2: Convert to fraction form
    268,170.60/402,137.10 = 90,629.40/x
  3. Step 3: Cross multiply
    268,170.60x = 402,137.10 × 90,629.40
  4. Step 4: Simplify right side
    268,170.60x = 36,445,444,090.74
  5. Step 5: Solve for x
    x = 36,445,444,090.74/268,170.60
  6. Step 6: Final answer
    x = 135,903.95

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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.