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Finding the Fourth Proportional to 73,259,939.40, 109,889,909.10 and 18,672,419.40

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Solution

The fourth proportional to 73,259,939.40, 109,889,909.10 and 18,672,419.40 is: 28,008,629.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,259,939.40 : 109,889,909.10 = 18,672,419.40 : x
  2. Step 2: Convert to fraction form
    73,259,939.40/109,889,909.10 = 18,672,419.40/x
  3. Step 3: Cross multiply
    73,259,939.40x = 109,889,909.10 × 18,672,419.40
  4. Step 4: Simplify right side
    73,259,939.40x = 2,051,910,470,543,076.25
  5. Step 5: Solve for x
    x = 2,051,910,470,543,076.25/73,259,939.40
  6. Step 6: Final answer
    x = 28,008,629.10

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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.