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Finding the Fourth Proportional to 90,144.84, 135,220.65 and 26,965.80

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Solution

The fourth proportional to 90,144.84, 135,220.65 and 26,965.80 is: 40,449.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,144.84 : 135,220.65 = 26,965.80 : x
  2. Step 2: Convert to fraction form
    90,144.84/135,220.65 = 26,965.80/x
  3. Step 3: Cross multiply
    90,144.84x = 135,220.65 × 26,965.80
  4. Step 4: Simplify right side
    90,144.84x = 3,646,333,003.77
  5. Step 5: Solve for x
    x = 3,646,333,003.77/90,144.84
  6. Step 6: Final answer
    x = 40,449.71

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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.