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Finding the Fourth Proportional to 57,725.60, 86,566.80 and 20,271.20

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Solution

The fourth proportional to 57,725.60, 86,566.80 and 20,271.20 is: 30,399.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,725.60 : 86,566.80 = 20,271.20 : x
  2. Step 2: Convert to fraction form
    57,725.60/86,566.80 = 20,271.20/x
  3. Step 3: Cross multiply
    57,725.60x = 86,566.80 × 20,271.20
  4. Step 4: Simplify right side
    57,725.60x = 1,754,812,916.16
  5. Step 5: Solve for x
    x = 1,754,812,916.16/57,725.60
  6. Step 6: Final answer
    x = 30,399.21

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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.