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Finding the Fourth Proportional to 207,404.88, 311,038.14 and 81,012.36

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Solution

The fourth proportional to 207,404.88, 311,038.14 and 81,012.36 is: 121,491.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,404.88 : 311,038.14 = 81,012.36 : x
  2. Step 2: Convert to fraction form
    207,404.88/311,038.14 = 81,012.36/x
  3. Step 3: Cross multiply
    207,404.88x = 311,038.14 × 81,012.36
  4. Step 4: Simplify right side
    207,404.88x = 25,197,933,771.41
  5. Step 5: Solve for x
    x = 25,197,933,771.41/207,404.88
  6. Step 6: Final answer
    x = 121,491.52

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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.