Home / 445,512.20-668,421.30-130,015.40

Finding the Fourth Proportional to 445,512.20, 668,421.30 and 130,015.40

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Solution

The fourth proportional to 445,512.20, 668,421.30 and 130,015.40 is: 195,067.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,512.20 : 668,421.30 = 130,015.40 : x
  2. Step 2: Convert to fraction form
    445,512.20/668,421.30 = 130,015.40/x
  3. Step 3: Cross multiply
    445,512.20x = 668,421.30 × 130,015.40
  4. Step 4: Simplify right side
    445,512.20x = 86,905,062,688.02
  5. Step 5: Solve for x
    x = 86,905,062,688.02/445,512.20
  6. Step 6: Final answer
    x = 195,067.75

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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.