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Finding the Fourth Proportional to 57,014.40, 85,461.12 and 21,938.88

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Solution

The fourth proportional to 57,014.40, 85,461.12 and 21,938.88 is: 32,885.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,014.40 : 85,461.12 = 21,938.88 : x
  2. Step 2: Convert to fraction form
    57,014.40/85,461.12 = 21,938.88/x
  3. Step 3: Cross multiply
    57,014.40x = 85,461.12 × 21,938.88
  4. Step 4: Simplify right side
    57,014.40x = 1,874,921,256.35
  5. Step 5: Solve for x
    x = 1,874,921,256.35/57,014.40
  6. Step 6: Final answer
    x = 32,885.05

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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.