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Finding the Fourth Proportional to 117,991.68, 162,816.36 and 72,662.40

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Solution

The fourth proportional to 117,991.68, 162,816.36 and 72,662.40 is: 100,266.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,991.68 : 162,816.36 = 72,662.40 : x
  2. Step 2: Convert to fraction form
    117,991.68/162,816.36 = 72,662.40/x
  3. Step 3: Cross multiply
    117,991.68x = 162,816.36 × 72,662.40
  4. Step 4: Simplify right side
    117,991.68x = 11,830,627,476.86
  5. Step 5: Solve for x
    x = 11,830,627,476.86/117,991.68
  6. Step 6: Final answer
    x = 100,266.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.