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Finding the Fourth Proportional to 85,845.96, 128,711.16 and 33,193.80

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Solution

The fourth proportional to 85,845.96, 128,711.16 and 33,193.80 is: 49,768.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,845.96 : 128,711.16 = 33,193.80 : x
  2. Step 2: Convert to fraction form
    85,845.96/128,711.16 = 33,193.80/x
  3. Step 3: Cross multiply
    85,845.96x = 128,711.16 × 33,193.80
  4. Step 4: Simplify right side
    85,845.96x = 4,272,412,502.81
  5. Step 5: Solve for x
    x = 4,272,412,502.81/85,845.96
  6. Step 6: Final answer
    x = 49,768.36

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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.