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Finding the Fourth Proportional to 57,308.40, 85,910.76 and 20,363.76

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Solution

The fourth proportional to 57,308.40, 85,910.76 and 20,363.76 is: 30,527.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,308.40 : 85,910.76 = 20,363.76 : x
  2. Step 2: Convert to fraction form
    57,308.40/85,910.76 = 20,363.76/x
  3. Step 3: Cross multiply
    57,308.40x = 85,910.76 × 20,363.76
  4. Step 4: Simplify right side
    57,308.40x = 1,749,466,098.06
  5. Step 5: Solve for x
    x = 1,749,466,098.06/57,308.40
  6. Step 6: Final answer
    x = 30,527.22

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1.5x scale

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.