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Finding the Fourth Proportional to 333,810.20, 500,708.20 and 81,091.88

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Solution

The fourth proportional to 333,810.20, 500,708.20 and 81,091.88 is: 121,636.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    333,810.20 : 500,708.20 = 81,091.88 : x
  2. Step 2: Convert to fraction form
    333,810.20/500,708.20 = 81,091.88/x
  3. Step 3: Cross multiply
    333,810.20x = 500,708.20 × 81,091.88
  4. Step 4: Simplify right side
    333,810.20x = 40,603,369,269.42
  5. Step 5: Solve for x
    x = 40,603,369,269.42/333,810.20
  6. Step 6: Final answer
    x = 121,636.10

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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.