Home / 72,557,112.78-100,128,815.64-39,962,064.78

Finding the Fourth Proportional to 72,557,112.78, 100,128,815.64 and 39,962,064.78

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Solution

The fourth proportional to 72,557,112.78, 100,128,815.64 and 39,962,064.78 is: 55,147,649.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,557,112.78 : 100,128,815.64 = 39,962,064.78 : x
  2. Step 2: Convert to fraction form
    72,557,112.78/100,128,815.64 = 39,962,064.78/x
  3. Step 3: Cross multiply
    72,557,112.78x = 100,128,815.64 × 39,962,064.78
  4. Step 4: Simplify right side
    72,557,112.78x = 4,001,354,216,950,357.50
  5. Step 5: Solve for x
    x = 4,001,354,216,950,357.50/72,557,112.78
  6. Step 6: Final answer
    x = 55,147,649.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.