Home / 81,739.45-122,605.77-28,443.63

Finding the Fourth Proportional to 81,739.45, 122,605.77 and 28,443.63

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Solution

The fourth proportional to 81,739.45, 122,605.77 and 28,443.63 is: 42,664.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,739.45 : 122,605.77 = 28,443.63 : x
  2. Step 2: Convert to fraction form
    81,739.45/122,605.77 = 28,443.63/x
  3. Step 3: Cross multiply
    81,739.45x = 122,605.77 × 28,443.63
  4. Step 4: Simplify right side
    81,739.45x = 3,487,353,157.75
  5. Step 5: Solve for x
    x = 3,487,353,157.75/81,739.45
  6. Step 6: Final answer
    x = 42,664.26

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1.5x scale

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.