Home / 85,967,999.70-128,951,999.55-55,356,998.10

Finding the Fourth Proportional to 85,967,999.70, 128,951,999.55 and 55,356,998.10

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Solution

The fourth proportional to 85,967,999.70, 128,951,999.55 and 55,356,998.10 is: 83,035,497.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,967,999.70 : 128,951,999.55 = 55,356,998.10 : x
  2. Step 2: Convert to fraction form
    85,967,999.70/128,951,999.55 = 55,356,998.10/x
  3. Step 3: Cross multiply
    85,967,999.70x = 128,951,999.55 × 55,356,998.10
  4. Step 4: Simplify right side
    85,967,999.70x = 7,138,395,594,080,551
  5. Step 5: Solve for x
    x = 7,138,395,594,080,551/85,967,999.70
  6. Step 6: Final answer
    x = 83,035,497.15

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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.