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Finding the Fourth Proportional to 303,364.70, 455,047.05 and 81,748.70

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Solution

The fourth proportional to 303,364.70, 455,047.05 and 81,748.70 is: 122,623.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,364.70 : 455,047.05 = 81,748.70 : x
  2. Step 2: Convert to fraction form
    303,364.70/455,047.05 = 81,748.70/x
  3. Step 3: Cross multiply
    303,364.70x = 455,047.05 × 81,748.70
  4. Step 4: Simplify right side
    303,364.70x = 37,199,504,776.34
  5. Step 5: Solve for x
    x = 37,199,504,776.34/303,364.70
  6. Step 6: Final answer
    x = 122,623.05

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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.