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Finding the Fourth Proportional to 85,672.38, 128,553.53 and 35,108.94

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Solution

The fourth proportional to 85,672.38, 128,553.53 and 35,108.94 is: 52,681.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,672.38 : 128,553.53 = 35,108.94 : x
  2. Step 2: Convert to fraction form
    85,672.38/128,553.53 = 35,108.94/x
  3. Step 3: Cross multiply
    85,672.38x = 128,553.53 × 35,108.94
  4. Step 4: Simplify right side
    85,672.38x = 4,513,378,171.56
  5. Step 5: Solve for x
    x = 4,513,378,171.56/85,672.38
  6. Step 6: Final answer
    x = 52,681.83

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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.