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Finding the Fourth Proportional to 445,689.86, 668,581.65 and 130,147.65

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Solution

The fourth proportional to 445,689.86, 668,581.65 and 130,147.65 is: 195,235.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,689.86 : 668,581.65 = 130,147.65 : x
  2. Step 2: Convert to fraction form
    445,689.86/668,581.65 = 130,147.65/x
  3. Step 3: Cross multiply
    445,689.86x = 668,581.65 × 130,147.65
  4. Step 4: Simplify right side
    445,689.86x = 87,014,330,580.62
  5. Step 5: Solve for x
    x = 87,014,330,580.62/445,689.86
  6. Step 6: Final answer
    x = 195,235.16

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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.