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Finding the Fourth Proportional to 445,456.16, 668,119.44 and 129,828.32

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Solution

The fourth proportional to 445,456.16, 668,119.44 and 129,828.32 is: 194,723.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,456.16 : 668,119.44 = 129,828.32 : x
  2. Step 2: Convert to fraction form
    445,456.16/668,119.44 = 129,828.32/x
  3. Step 3: Cross multiply
    445,456.16x = 668,119.44 × 129,828.32
  4. Step 4: Simplify right side
    445,456.16x = 86,740,824,454.54
  5. Step 5: Solve for x
    x = 86,740,824,454.54/445,456.16
  6. Step 6: Final answer
    x = 194,723.59

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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.