Home / 81,605.24-122,309.43-42,140.84

Finding the Fourth Proportional to 81,605.24, 122,309.43 and 42,140.84

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Solution

The fourth proportional to 81,605.24, 122,309.43 and 42,140.84 is: 63,160.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,605.24 : 122,309.43 = 42,140.84 : x
  2. Step 2: Convert to fraction form
    81,605.24/122,309.43 = 42,140.84/x
  3. Step 3: Cross multiply
    81,605.24x = 122,309.43 × 42,140.84
  4. Step 4: Simplify right side
    81,605.24x = 5,154,222,120.12
  5. Step 5: Solve for x
    x = 5,154,222,120.12/81,605.24
  6. Step 6: Final answer
    x = 63,160.43

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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.