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Finding the Fourth Proportional to 121,498.40, 182,247.60 and 90,394.40

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Solution

The fourth proportional to 121,498.40, 182,247.60 and 90,394.40 is: 135,591.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,498.40 : 182,247.60 = 90,394.40 : x
  2. Step 2: Convert to fraction form
    121,498.40/182,247.60 = 90,394.40/x
  3. Step 3: Cross multiply
    121,498.40x = 182,247.60 × 90,394.40
  4. Step 4: Simplify right side
    121,498.40x = 16,474,162,453.44
  5. Step 5: Solve for x
    x = 16,474,162,453.44/121,498.40
  6. Step 6: Final answer
    x = 135,591.60

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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.