Home / 81,755.21-112,776.11-51,488.55

Finding the Fourth Proportional to 81,755.21, 112,776.11 and 51,488.55

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Solution

The fourth proportional to 81,755.21, 112,776.11 and 51,488.55 is: 71,025.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,755.21 : 112,776.11 = 51,488.55 : x
  2. Step 2: Convert to fraction form
    81,755.21/112,776.11 = 51,488.55/x
  3. Step 3: Cross multiply
    81,755.21x = 112,776.11 × 51,488.55
  4. Step 4: Simplify right side
    81,755.21x = 5,806,678,121.10
  5. Step 5: Solve for x
    x = 5,806,678,121.10/81,755.21
  6. Step 6: Final answer
    x = 71,025.18

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1.5x scale

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.