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Finding the Fourth Proportional to 59,929.80, 89,991.90 and 43,405.80

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Solution

The fourth proportional to 59,929.80, 89,991.90 and 43,405.80 is: 65,179.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,929.80 : 89,991.90 = 43,405.80 : x
  2. Step 2: Convert to fraction form
    59,929.80/89,991.90 = 43,405.80/x
  3. Step 3: Cross multiply
    59,929.80x = 89,991.90 × 43,405.80
  4. Step 4: Simplify right side
    59,929.80x = 3,906,170,413.02
  5. Step 5: Solve for x
    x = 3,906,170,413.02/59,929.80
  6. Step 6: Final answer
    x = 65,179.10

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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.