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Finding the Fourth Proportional to 114,917.60, 171,987.60 and 100,920.80

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Solution

The fourth proportional to 114,917.60, 171,987.60 and 100,920.80 is: 151,039.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    114,917.60 : 171,987.60 = 100,920.80 : x
  2. Step 2: Convert to fraction form
    114,917.60/171,987.60 = 100,920.80/x
  3. Step 3: Cross multiply
    114,917.60x = 171,987.60 × 100,920.80
  4. Step 4: Simplify right side
    114,917.60x = 17,357,126,182.08
  5. Step 5: Solve for x
    x = 17,357,126,182.08/114,917.60
  6. Step 6: Final answer
    x = 151,039.76

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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.