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Finding the Fourth Proportional to 86,911,939.20, 130,383,655.20 and 43,672,324.80

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Solution

The fourth proportional to 86,911,939.20, 130,383,655.20 and 43,672,324.80 is: 65,516,399.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,911,939.20 : 130,383,655.20 = 43,672,324.80 : x
  2. Step 2: Convert to fraction form
    86,911,939.20/130,383,655.20 = 43,672,324.80/x
  3. Step 3: Cross multiply
    86,911,939.20x = 130,383,655.20 × 43,672,324.80
  4. Step 4: Simplify right side
    86,911,939.20x = 5,694,157,338,505,609
  5. Step 5: Solve for x
    x = 5,694,157,338,505,609/86,911,939.20
  6. Step 6: Final answer
    x = 65,516,399.60

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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.