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Finding the Fourth Proportional to 85,342.85, 128,051.18 and 32,740.03

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Solution

The fourth proportional to 85,342.85, 128,051.18 and 32,740.03 is: 49,124.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,342.85 : 128,051.18 = 32,740.03 : x
  2. Step 2: Convert to fraction form
    85,342.85/128,051.18 = 32,740.03/x
  3. Step 3: Cross multiply
    85,342.85x = 128,051.18 × 32,740.03
  4. Step 4: Simplify right side
    85,342.85x = 4,192,399,593.87
  5. Step 5: Solve for x
    x = 4,192,399,593.87/85,342.85
  6. Step 6: Final answer
    x = 49,124.20

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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.