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Finding the Fourth Proportional to 135,938.70, 203,908.05 and 100,946.70

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Solution

The fourth proportional to 135,938.70, 203,908.05 and 100,946.70 is: 151,420.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,938.70 : 203,908.05 = 100,946.70 : x
  2. Step 2: Convert to fraction form
    135,938.70/203,908.05 = 100,946.70/x
  3. Step 3: Cross multiply
    135,938.70x = 203,908.05 × 100,946.70
  4. Step 4: Simplify right side
    135,938.70x = 20,583,844,750.94
  5. Step 5: Solve for x
    x = 20,583,844,750.94/135,938.70
  6. Step 6: Final answer
    x = 151,420.05

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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.