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Finding the Fourth Proportional to 219,642.41, 329,338.76 and 86,450.46

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Solution

The fourth proportional to 219,642.41, 329,338.76 and 86,450.46 is: 129,626.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,642.41 : 329,338.76 = 86,450.46 : x
  2. Step 2: Convert to fraction form
    219,642.41/329,338.76 = 86,450.46/x
  3. Step 3: Cross multiply
    219,642.41x = 329,338.76 × 86,450.46
  4. Step 4: Simplify right side
    219,642.41x = 28,471,487,297.83
  5. Step 5: Solve for x
    x = 28,471,487,297.83/219,642.41
  6. Step 6: Final answer
    x = 129,626.55

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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.