Home / 72,557,121.78-100,128,828.06-39,962,073.78

Finding the Fourth Proportional to 72,557,121.78, 100,128,828.06 and 39,962,073.78

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Solution

The fourth proportional to 72,557,121.78, 100,128,828.06 and 39,962,073.78 is: 55,147,661.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,557,121.78 : 100,128,828.06 = 39,962,073.78 : x
  2. Step 2: Convert to fraction form
    72,557,121.78/100,128,828.06 = 39,962,073.78/x
  3. Step 3: Cross multiply
    72,557,121.78x = 100,128,828.06 × 39,962,073.78
  4. Step 4: Simplify right side
    72,557,121.78x = 4,001,355,614,438,654.50
  5. Step 5: Solve for x
    x = 4,001,355,614,438,654.50/72,557,121.78
  6. Step 6: Final answer
    x = 55,147,661.82

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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.