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Finding the Fourth Proportional to 445,362.20, 668,043.30 and 129,829.40

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Solution

The fourth proportional to 445,362.20, 668,043.30 and 129,829.40 is: 194,744.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,362.20 : 668,043.30 = 129,829.40 : x
  2. Step 2: Convert to fraction form
    445,362.20/668,043.30 = 129,829.40/x
  3. Step 3: Cross multiply
    445,362.20x = 668,043.30 × 129,829.40
  4. Step 4: Simplify right side
    445,362.20x = 86,731,660,813.02
  5. Step 5: Solve for x
    x = 86,731,660,813.02/445,362.20
  6. Step 6: Final answer
    x = 194,744.10

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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.