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Finding the Fourth Proportional to 90,381.56, 135,609.50 and 39,754.52

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Solution

The fourth proportional to 90,381.56, 135,609.50 and 39,754.52 is: 59,648.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,381.56 : 135,609.50 = 39,754.52 : x
  2. Step 2: Convert to fraction form
    90,381.56/135,609.50 = 39,754.52/x
  3. Step 3: Cross multiply
    90,381.56x = 135,609.50 × 39,754.52
  4. Step 4: Simplify right side
    90,381.56x = 5,391,090,579.94
  5. Step 5: Solve for x
    x = 5,391,090,579.94/90,381.56
  6. Step 6: Final answer
    x = 59,648.12

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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.