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Finding the Fourth Proportional to 317,814.87, 476,721.90 and 81,157.71

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Solution

The fourth proportional to 317,814.87, 476,721.90 and 81,157.71 is: 121,736.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,814.87 : 476,721.90 = 81,157.71 : x
  2. Step 2: Convert to fraction form
    317,814.87/476,721.90 = 81,157.71/x
  3. Step 3: Cross multiply
    317,814.87x = 476,721.90 × 81,157.71
  4. Step 4: Simplify right side
    317,814.87x = 38,689,657,710.85
  5. Step 5: Solve for x
    x = 38,689,657,710.85/317,814.87
  6. Step 6: Final answer
    x = 121,736.46

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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.