Home / 80,123,979.78-120,185,782.80-52,631,436.60

Finding the Fourth Proportional to 80,123,979.78, 120,185,782.80 and 52,631,436.60

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Solution

The fourth proportional to 80,123,979.78, 120,185,782.80 and 52,631,436.60 is: 78,947,032.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,123,979.78 : 120,185,782.80 = 52,631,436.60 : x
  2. Step 2: Convert to fraction form
    80,123,979.78/120,185,782.80 = 52,631,436.60/x
  3. Step 3: Cross multiply
    80,123,979.78x = 120,185,782.80 × 52,631,436.60
  4. Step 4: Simplify right side
    80,123,979.78x = 6,325,550,407,462,203
  5. Step 5: Solve for x
    x = 6,325,550,407,462,203/80,123,979.78
  6. Step 6: Final answer
    x = 78,947,032.15

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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.