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Finding the Fourth Proportional to 268,171.60, 402,138.60 and 90,630.40

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Solution

The fourth proportional to 268,171.60, 402,138.60 and 90,630.40 is: 135,905.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,171.60 : 402,138.60 = 90,630.40 : x
  2. Step 2: Convert to fraction form
    268,171.60/402,138.60 = 90,630.40/x
  3. Step 3: Cross multiply
    268,171.60x = 402,138.60 × 90,630.40
  4. Step 4: Simplify right side
    268,171.60x = 36,445,982,173.44
  5. Step 5: Solve for x
    x = 36,445,982,173.44/268,171.60
  6. Step 6: Final answer
    x = 135,905.45

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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.