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Finding the Fourth Proportional to 57,989.76, 87,018.12 and 31,335.84

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Solution

The fourth proportional to 57,989.76, 87,018.12 and 31,335.84 is: 47,021.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,989.76 : 87,018.12 = 31,335.84 : x
  2. Step 2: Convert to fraction form
    57,989.76/87,018.12 = 31,335.84/x
  3. Step 3: Cross multiply
    57,989.76x = 87,018.12 × 31,335.84
  4. Step 4: Simplify right side
    57,989.76x = 2,726,785,885.42
  5. Step 5: Solve for x
    x = 2,726,785,885.42/57,989.76
  6. Step 6: Final answer
    x = 47,021.85

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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.