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Finding the Fourth Proportional to 85,940.01, 128,960.18 and 36,015.96

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Solution

The fourth proportional to 85,940.01, 128,960.18 and 36,015.96 is: 54,044.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,940.01 : 128,960.18 = 36,015.96 : x
  2. Step 2: Convert to fraction form
    85,940.01/128,960.18 = 36,015.96/x
  3. Step 3: Cross multiply
    85,940.01x = 128,960.18 × 36,015.96
  4. Step 4: Simplify right side
    85,940.01x = 4,644,624,684.47
  5. Step 5: Solve for x
    x = 4,644,624,684.47/85,940.01
  6. Step 6: Final answer
    x = 54,044.96

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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.