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Finding the Fourth Proportional to 225,885.88, 311,716.91 and 129,083.59

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Solution

The fourth proportional to 225,885.88, 311,716.91 and 129,083.59 is: 178,132.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,885.88 : 311,716.91 = 129,083.59 : x
  2. Step 2: Convert to fraction form
    225,885.88/311,716.91 = 129,083.59/x
  3. Step 3: Cross multiply
    225,885.88x = 311,716.91 × 129,083.59
  4. Step 4: Simplify right side
    225,885.88x = 40,237,535,602.50
  5. Step 5: Solve for x
    x = 40,237,535,602.50/225,885.88
  6. Step 6: Final answer
    x = 178,132.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.