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Finding the Fourth Proportional to 445,920.79, 668,797.10 and 126,070.12

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Solution

The fourth proportional to 445,920.79, 668,797.10 and 126,070.12 is: 189,081.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,920.79 : 668,797.10 = 126,070.12 : x
  2. Step 2: Convert to fraction form
    445,920.79/668,797.10 = 126,070.12/x
  3. Step 3: Cross multiply
    445,920.79x = 668,797.10 × 126,070.12
  4. Step 4: Simplify right side
    445,920.79x = 84,315,328,350.31
  5. Step 5: Solve for x
    x = 84,315,328,350.31/445,920.79
  6. Step 6: Final answer
    x = 189,081.40

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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.