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Finding the Fourth Proportional to 317,932.40, 476,896.72 and 81,274.72

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Solution

The fourth proportional to 317,932.40, 476,896.72 and 81,274.72 is: 121,911.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,932.40 : 476,896.72 = 81,274.72 : x
  2. Step 2: Convert to fraction form
    317,932.40/476,896.72 = 81,274.72/x
  3. Step 3: Cross multiply
    317,932.40x = 476,896.72 × 81,274.72
  4. Step 4: Simplify right side
    317,932.40x = 38,759,647,386.92
  5. Step 5: Solve for x
    x = 38,759,647,386.92/317,932.40
  6. Step 6: Final answer
    x = 121,911.60

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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.