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Finding the Fourth Proportional to 445,503.88, 668,316.30 and 129,958.12

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Solution

The fourth proportional to 445,503.88, 668,316.30 and 129,958.12 is: 194,954.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,503.88 : 668,316.30 = 129,958.12 : x
  2. Step 2: Convert to fraction form
    445,503.88/668,316.30 = 129,958.12/x
  3. Step 3: Cross multiply
    445,503.88x = 668,316.30 × 129,958.12
  4. Step 4: Simplify right side
    445,503.88x = 86,853,129,913.36
  5. Step 5: Solve for x
    x = 86,853,129,913.36/445,503.88
  6. Step 6: Final answer
    x = 194,954.82

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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.