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Finding the Fourth Proportional to 85,549.81, 128,324.78 and 23,220.31

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Solution

The fourth proportional to 85,549.81, 128,324.78 and 23,220.31 is: 34,830.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,549.81 : 128,324.78 = 23,220.31 : x
  2. Step 2: Convert to fraction form
    85,549.81/128,324.78 = 23,220.31/x
  3. Step 3: Cross multiply
    85,549.81x = 128,324.78 × 23,220.31
  4. Step 4: Simplify right side
    85,549.81x = 2,979,741,172.28
  5. Step 5: Solve for x
    x = 2,979,741,172.28/85,549.81
  6. Step 6: Final answer
    x = 34,830.48

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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.