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Finding the Fourth Proportional to 317,912.13, 476,866.98 and 81,254.43

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Solution

The fourth proportional to 317,912.13, 476,866.98 and 81,254.43 is: 121,881.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,912.13 : 476,866.98 = 81,254.43 : x
  2. Step 2: Convert to fraction form
    317,912.13/476,866.98 = 81,254.43/x
  3. Step 3: Cross multiply
    317,912.13x = 476,866.98 × 81,254.43
  4. Step 4: Simplify right side
    317,912.13x = 38,747,554,645.72
  5. Step 5: Solve for x
    x = 38,747,554,645.72/317,912.13
  6. Step 6: Final answer
    x = 121,881.33

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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.