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Finding the Fourth Proportional to 215,390.76, 323,086 and 57,615.12

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Solution

The fourth proportional to 215,390.76, 323,086 and 57,615.12 is: 86,422.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,390.76 : 323,086 = 57,615.12 : x
  2. Step 2: Convert to fraction form
    215,390.76/323,086 = 57,615.12/x
  3. Step 3: Cross multiply
    215,390.76x = 323,086 × 57,615.12
  4. Step 4: Simplify right side
    215,390.76x = 18,614,638,660.32
  5. Step 5: Solve for x
    x = 18,614,638,660.32/215,390.76
  6. Step 6: Final answer
    x = 86,422.64

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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.