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Finding the Fourth Proportional to 57,730.56, 86,600.75 and 20,287.40

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Solution

The fourth proportional to 57,730.56, 86,600.75 and 20,287.40 is: 30,432.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,730.56 : 86,600.75 = 20,287.40 : x
  2. Step 2: Convert to fraction form
    57,730.56/86,600.75 = 20,287.40/x
  3. Step 3: Cross multiply
    57,730.56x = 86,600.75 × 20,287.40
  4. Step 4: Simplify right side
    57,730.56x = 1,756,903,521.11
  5. Step 5: Solve for x
    x = 1,756,903,521.11/57,730.56
  6. Step 6: Final answer
    x = 30,432.82

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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.