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Finding the Fourth Proportional to 143,047.92, 197,385.96 and 85,673.80

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Solution

The fourth proportional to 143,047.92, 197,385.96 and 85,673.80 is: 118,217.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,047.92 : 197,385.96 = 85,673.80 : x
  2. Step 2: Convert to fraction form
    143,047.92/197,385.96 = 85,673.80/x
  3. Step 3: Cross multiply
    143,047.92x = 197,385.96 × 85,673.80
  4. Step 4: Simplify right side
    143,047.92x = 16,910,805,827.86
  5. Step 5: Solve for x
    x = 16,910,805,827.86/143,047.92
  6. Step 6: Final answer
    x = 118,217.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.