Home / 72,132.94-99,540.36-39,865.89

Finding the Fourth Proportional to 72,132.94, 99,540.36 and 39,865.89

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Solution

The fourth proportional to 72,132.94, 99,540.36 and 39,865.89 is: 55,013.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,132.94 : 99,540.36 = 39,865.89 : x
  2. Step 2: Convert to fraction form
    72,132.94/99,540.36 = 39,865.89/x
  3. Step 3: Cross multiply
    72,132.94x = 99,540.36 × 39,865.89
  4. Step 4: Simplify right side
    72,132.94x = 3,968,265,023.60
  5. Step 5: Solve for x
    x = 3,968,265,023.60/72,132.94
  6. Step 6: Final answer
    x = 55,013.22

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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.