Home / 138,735,896.40-208,103,844.60-87,451,621.20

Finding the Fourth Proportional to 138,735,896.40, 208,103,844.60 and 87,451,621.20

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Solution

The fourth proportional to 138,735,896.40, 208,103,844.60 and 87,451,621.20 is: 131,177,431.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,735,896.40 : 208,103,844.60 = 87,451,621.20 : x
  2. Step 2: Convert to fraction form
    138,735,896.40/208,103,844.60 = 87,451,621.20/x
  3. Step 3: Cross multiply
    138,735,896.40x = 208,103,844.60 × 87,451,621.20
  4. Step 4: Simplify right side
    138,735,896.40x = 18,199,018,588,222,864
  5. Step 5: Solve for x
    x = 18,199,018,588,222,864/138,735,896.40
  6. Step 6: Final answer
    x = 131,177,431.80

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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.