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Finding the Fourth Proportional to 72,336.28, 99,824.22 and 40,505.08

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Solution

The fourth proportional to 72,336.28, 99,824.22 and 40,505.08 is: 55,897.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,336.28 : 99,824.22 = 40,505.08 : x
  2. Step 2: Convert to fraction form
    72,336.28/99,824.22 = 40,505.08/x
  3. Step 3: Cross multiply
    72,336.28x = 99,824.22 × 40,505.08
  4. Step 4: Simplify right side
    72,336.28x = 4,043,388,017.04
  5. Step 5: Solve for x
    x = 4,043,388,017.04/72,336.28
  6. Step 6: Final answer
    x = 55,897.10

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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.