Home / 71,986.10-99,340.75-40,154.98

Finding the Fourth Proportional to 71,986.10, 99,340.75 and 40,154.98

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Solution

The fourth proportional to 71,986.10, 99,340.75 and 40,154.98 is: 55,413.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,986.10 : 99,340.75 = 40,154.98 : x
  2. Step 2: Convert to fraction form
    71,986.10/99,340.75 = 40,154.98/x
  3. Step 3: Cross multiply
    71,986.10x = 99,340.75 × 40,154.98
  4. Step 4: Simplify right side
    71,986.10x = 3,989,025,829.44
  5. Step 5: Solve for x
    x = 3,989,025,829.44/71,986.10
  6. Step 6: Final answer
    x = 55,413.83

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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.