Home / 90,333.09-135,450.77-71,732.79

Finding the Fourth Proportional to 90,333.09, 135,450.77 and 71,732.79

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Solution

The fourth proportional to 90,333.09, 135,450.77 and 71,732.79 is: 107,560.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,333.09 : 135,450.77 = 71,732.79 : x
  2. Step 2: Convert to fraction form
    90,333.09/135,450.77 = 71,732.79/x
  3. Step 3: Cross multiply
    90,333.09x = 135,450.77 × 71,732.79
  4. Step 4: Simplify right side
    90,333.09x = 9,716,261,281.08
  5. Step 5: Solve for x
    x = 9,716,261,281.08/90,333.09
  6. Step 6: Final answer
    x = 107,560.38

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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.