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Finding the Fourth Proportional to 90,299.94, 135,449.97 and 53,119.18

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Solution

The fourth proportional to 90,299.94, 135,449.97 and 53,119.18 is: 79,678.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,299.94 : 135,449.97 = 53,119.18 : x
  2. Step 2: Convert to fraction form
    90,299.94/135,449.97 = 53,119.18/x
  3. Step 3: Cross multiply
    90,299.94x = 135,449.97 × 53,119.18
  4. Step 4: Simplify right side
    90,299.94x = 7,194,991,337.42
  5. Step 5: Solve for x
    x = 7,194,991,337.42/90,299.94
  6. Step 6: Final answer
    x = 79,678.81

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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.