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Finding the Fourth Proportional to 57,421.52, 86,137.20 and 15,868.52

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Solution

The fourth proportional to 57,421.52, 86,137.20 and 15,868.52 is: 23,804.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,421.52 : 86,137.20 = 15,868.52 : x
  2. Step 2: Convert to fraction form
    57,421.52/86,137.20 = 15,868.52/x
  3. Step 3: Cross multiply
    57,421.52x = 86,137.20 × 15,868.52
  4. Step 4: Simplify right side
    57,421.52x = 1,366,869,880.94
  5. Step 5: Solve for x
    x = 1,366,869,880.94/57,421.52
  6. Step 6: Final answer
    x = 23,804.14

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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.