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Finding the Fourth Proportional to 202,285.60, 303,601.20 and 90,138.40

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Solution

The fourth proportional to 202,285.60, 303,601.20 and 90,138.40 is: 135,284.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,285.60 : 303,601.20 = 90,138.40 : x
  2. Step 2: Convert to fraction form
    202,285.60/303,601.20 = 90,138.40/x
  3. Step 3: Cross multiply
    202,285.60x = 303,601.20 × 90,138.40
  4. Step 4: Simplify right side
    202,285.60x = 27,366,126,406.08
  5. Step 5: Solve for x
    x = 27,366,126,406.08/202,285.60
  6. Step 6: Final answer
    x = 135,284.60

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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.