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Finding the Fourth Proportional to 445,612.40, 668,515.80 and 130,043.60

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Solution

The fourth proportional to 445,612.40, 668,515.80 and 130,043.60 is: 195,093.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,612.40 : 668,515.80 = 130,043.60 : x
  2. Step 2: Convert to fraction form
    445,612.40/668,515.80 = 130,043.60/x
  3. Step 3: Cross multiply
    445,612.40x = 668,515.80 × 130,043.60
  4. Step 4: Simplify right side
    445,612.40x = 86,936,201,288.88
  5. Step 5: Solve for x
    x = 86,936,201,288.88/445,612.40
  6. Step 6: Final answer
    x = 195,093.77

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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.