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Finding the Fourth Proportional to 203,931.70, 305,897.55 and 133,072.90

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Solution

The fourth proportional to 203,931.70, 305,897.55 and 133,072.90 is: 199,609.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,931.70 : 305,897.55 = 133,072.90 : x
  2. Step 2: Convert to fraction form
    203,931.70/305,897.55 = 133,072.90/x
  3. Step 3: Cross multiply
    203,931.70x = 305,897.55 × 133,072.90
  4. Step 4: Simplify right side
    203,931.70x = 40,706,674,081.40
  5. Step 5: Solve for x
    x = 40,706,674,081.40/203,931.70
  6. Step 6: Final answer
    x = 199,609.35

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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.