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Finding the Fourth Proportional to 85,359.95, 128,039.94 and 29,200.59

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Solution

The fourth proportional to 85,359.95, 128,039.94 and 29,200.59 is: 43,800.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,359.95 : 128,039.94 = 29,200.59 : x
  2. Step 2: Convert to fraction form
    85,359.95/128,039.94 = 29,200.59/x
  3. Step 3: Cross multiply
    85,359.95x = 128,039.94 × 29,200.59
  4. Step 4: Simplify right side
    85,359.95x = 3,738,841,791.56
  5. Step 5: Solve for x
    x = 3,738,841,791.56/85,359.95
  6. Step 6: Final answer
    x = 43,800.89

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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.