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Finding the Fourth Proportional to 57,316.70, 85,989.96 and 21,778.70

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Solution

The fourth proportional to 57,316.70, 85,989.96 and 21,778.70 is: 32,673.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,316.70 : 85,989.96 = 21,778.70 : x
  2. Step 2: Convert to fraction form
    57,316.70/85,989.96 = 21,778.70/x
  3. Step 3: Cross multiply
    57,316.70x = 85,989.96 × 21,778.70
  4. Step 4: Simplify right side
    57,316.70x = 1,872,749,541.85
  5. Step 5: Solve for x
    x = 1,872,749,541.85/57,316.70
  6. Step 6: Final answer
    x = 32,673.72

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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.