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Finding the Fourth Proportional to 85,505.88, 128,189.64 and 35,623.47

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Solution

The fourth proportional to 85,505.88, 128,189.64 and 35,623.47 is: 53,406.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,505.88 : 128,189.64 = 35,623.47 : x
  2. Step 2: Convert to fraction form
    85,505.88/128,189.64 = 35,623.47/x
  3. Step 3: Cross multiply
    85,505.88x = 128,189.64 × 35,623.47
  4. Step 4: Simplify right side
    85,505.88x = 4,566,559,794.85
  5. Step 5: Solve for x
    x = 4,566,559,794.85/85,505.88
  6. Step 6: Final answer
    x = 53,406.38

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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.