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Finding the Fourth Proportional to 313,830.72, 470,473.92 and 126,720.72

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Solution

The fourth proportional to 313,830.72, 470,473.92 and 126,720.72 is: 189,971.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,830.72 : 470,473.92 = 126,720.72 : x
  2. Step 2: Convert to fraction form
    313,830.72/470,473.92 = 126,720.72/x
  3. Step 3: Cross multiply
    313,830.72x = 470,473.92 × 126,720.72
  4. Step 4: Simplify right side
    313,830.72x = 59,618,793,883.62
  5. Step 5: Solve for x
    x = 59,618,793,883.62/313,830.72
  6. Step 6: Final answer
    x = 189,971.19

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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.