Home / 81,588.16-122,382.21-28,999.72

Finding the Fourth Proportional to 81,588.16, 122,382.21 and 28,999.72

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Solution

The fourth proportional to 81,588.16, 122,382.21 and 28,999.72 is: 43,499.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,588.16 : 122,382.21 = 28,999.72 : x
  2. Step 2: Convert to fraction form
    81,588.16/122,382.21 = 28,999.72/x
  3. Step 3: Cross multiply
    81,588.16x = 122,382.21 × 28,999.72
  4. Step 4: Simplify right side
    81,588.16x = 3,549,049,822.98
  5. Step 5: Solve for x
    x = 3,549,049,822.98/81,588.16
  6. Step 6: Final answer
    x = 43,499.57

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Similar ratio
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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.