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Finding the Fourth Proportional to 86,912,015.20, 130,383,769.20 and 43,672,400.80

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Solution

The fourth proportional to 86,912,015.20, 130,383,769.20 and 43,672,400.80 is: 65,516,513.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,912,015.20 : 130,383,769.20 = 43,672,400.80 : x
  2. Step 2: Convert to fraction form
    86,912,015.20/130,383,769.20 = 43,672,400.80/x
  3. Step 3: Cross multiply
    86,912,015.20x = 130,383,769.20 × 43,672,400.80
  4. Step 4: Simplify right side
    86,912,015.20x = 5,694,172,226,317,095
  5. Step 5: Solve for x
    x = 5,694,172,226,317,095/86,912,015.20
  6. Step 6: Final answer
    x = 65,516,513.61

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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.