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Finding the Fourth Proportional to 85,655.38, 128,409.19 and 41,221.01

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Solution

The fourth proportional to 85,655.38, 128,409.19 and 41,221.01 is: 61,795.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,655.38 : 128,409.19 = 41,221.01 : x
  2. Step 2: Convert to fraction form
    85,655.38/128,409.19 = 41,221.01/x
  3. Step 3: Cross multiply
    85,655.38x = 128,409.19 × 41,221.01
  4. Step 4: Simplify right side
    85,655.38x = 5,293,156,505.08
  5. Step 5: Solve for x
    x = 5,293,156,505.08/85,655.38
  6. Step 6: Final answer
    x = 61,795.96

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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.