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Finding the Fourth Proportional to 209,469.80, 313,859.10 and 104,061.80

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Solution

The fourth proportional to 209,469.80, 313,859.10 and 104,061.80 is: 155,921.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,469.80 : 313,859.10 = 104,061.80 : x
  2. Step 2: Convert to fraction form
    209,469.80/313,859.10 = 104,061.80/x
  3. Step 3: Cross multiply
    209,469.80x = 313,859.10 × 104,061.80
  4. Step 4: Simplify right side
    209,469.80x = 32,660,742,892.38
  5. Step 5: Solve for x
    x = 32,660,742,892.38/209,469.80
  6. Step 6: Final answer
    x = 155,921.01

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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.