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Finding the Fourth Proportional to 90,699.84, 125,164.16 and 50,412.88

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Solution

The fourth proportional to 90,699.84, 125,164.16 and 50,412.88 is: 69,568.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,699.84 : 125,164.16 = 50,412.88 : x
  2. Step 2: Convert to fraction form
    90,699.84/125,164.16 = 50,412.88/x
  3. Step 3: Cross multiply
    90,699.84x = 125,164.16 × 50,412.88
  4. Step 4: Simplify right side
    90,699.84x = 6,309,885,778.38
  5. Step 5: Solve for x
    x = 6,309,885,778.38/90,699.84
  6. Step 6: Final answer
    x = 69,568.87

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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.