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Finding the Fourth Proportional to 445,919.86, 668,903.12 and 126,095.11

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Solution

The fourth proportional to 445,919.86, 668,903.12 and 126,095.11 is: 189,149.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,919.86 : 668,903.12 = 126,095.11 : x
  2. Step 2: Convert to fraction form
    445,919.86/668,903.12 = 126,095.11/x
  3. Step 3: Cross multiply
    445,919.86x = 668,903.12 × 126,095.11
  4. Step 4: Simplify right side
    445,919.86x = 84,345,412,495.74
  5. Step 5: Solve for x
    x = 84,345,412,495.74/445,919.86
  6. Step 6: Final answer
    x = 189,149.26

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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.