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Finding the Fourth Proportional to 57,124.80, 85,648.80 and 30,475.20

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Solution

The fourth proportional to 57,124.80, 85,648.80 and 30,475.20 is: 45,692.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,124.80 : 85,648.80 = 30,475.20 : x
  2. Step 2: Convert to fraction form
    57,124.80/85,648.80 = 30,475.20/x
  3. Step 3: Cross multiply
    57,124.80x = 85,648.80 × 30,475.20
  4. Step 4: Simplify right side
    57,124.80x = 2,610,164,309.76
  5. Step 5: Solve for x
    x = 2,610,164,309.76/57,124.80
  6. Step 6: Final answer
    x = 45,692.31

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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.