Home / 90,313.82-135,421.35-71,713.34

Finding the Fourth Proportional to 90,313.82, 135,421.35 and 71,713.34

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Solution

The fourth proportional to 90,313.82, 135,421.35 and 71,713.34 is: 107,530.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,313.82 : 135,421.35 = 71,713.34 : x
  2. Step 2: Convert to fraction form
    90,313.82/135,421.35 = 71,713.34/x
  3. Step 3: Cross multiply
    90,313.82x = 135,421.35 × 71,713.34
  4. Step 4: Simplify right side
    90,313.82x = 9,711,517,315.81
  5. Step 5: Solve for x
    x = 9,711,517,315.81/90,313.82
  6. Step 6: Final answer
    x = 107,530.80

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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.