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Finding the Fourth Proportional to 202,278.60, 303,590.70 and 90,131.40

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Solution

The fourth proportional to 202,278.60, 303,590.70 and 90,131.40 is: 135,274.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,278.60 : 303,590.70 = 90,131.40 : x
  2. Step 2: Convert to fraction form
    202,278.60/303,590.70 = 90,131.40/x
  3. Step 3: Cross multiply
    202,278.60x = 303,590.70 × 90,131.40
  4. Step 4: Simplify right side
    202,278.60x = 27,363,054,817.98
  5. Step 5: Solve for x
    x = 27,363,054,817.98/202,278.60
  6. Step 6: Final answer
    x = 135,274.10

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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.