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Finding the Fourth Proportional to 107,998.40, 161,479.20 and 80,004.80

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Solution

The fourth proportional to 107,998.40, 161,479.20 and 80,004.80 is: 119,623.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,998.40 : 161,479.20 = 80,004.80 : x
  2. Step 2: Convert to fraction form
    107,998.40/161,479.20 = 80,004.80/x
  3. Step 3: Cross multiply
    107,998.40x = 161,479.20 × 80,004.80
  4. Step 4: Simplify right side
    107,998.40x = 12,919,111,100.16
  5. Step 5: Solve for x
    x = 12,919,111,100.16/107,998.40
  6. Step 6: Final answer
    x = 119,623.17

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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.