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Finding the Fourth Proportional to 107,699.60, 161,743.80 and 78,150.80

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Solution

The fourth proportional to 107,699.60, 161,743.80 and 78,150.80 is: 117,367.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,699.60 : 161,743.80 = 78,150.80 : x
  2. Step 2: Convert to fraction form
    107,699.60/161,743.80 = 78,150.80/x
  3. Step 3: Cross multiply
    107,699.60x = 161,743.80 × 78,150.80
  4. Step 4: Simplify right side
    107,699.60x = 12,640,407,365.04
  5. Step 5: Solve for x
    x = 12,640,407,365.04/107,699.60
  6. Step 6: Final answer
    x = 117,367.26

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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.