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Finding the Fourth Proportional to 219,642.91, 329,339.51 and 86,450.96

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Solution

The fourth proportional to 219,642.91, 329,339.51 and 86,450.96 is: 129,627.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,642.91 : 329,339.51 = 86,450.96 : x
  2. Step 2: Convert to fraction form
    219,642.91/329,339.51 = 86,450.96/x
  3. Step 3: Cross multiply
    219,642.91x = 329,339.51 × 86,450.96
  4. Step 4: Simplify right side
    219,642.91x = 28,471,716,805.43
  5. Step 5: Solve for x
    x = 28,471,716,805.43/219,642.91
  6. Step 6: Final answer
    x = 129,627.30

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1.5x scale

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.