Home / 90,534.11-135,801.17-31,369.78

Finding the Fourth Proportional to 90,534.11, 135,801.17 and 31,369.78

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Solution

The fourth proportional to 90,534.11, 135,801.17 and 31,369.78 is: 47,054.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,534.11 : 135,801.17 = 31,369.78 : x
  2. Step 2: Convert to fraction form
    90,534.11/135,801.17 = 31,369.78/x
  3. Step 3: Cross multiply
    90,534.11x = 135,801.17 × 31,369.78
  4. Step 4: Simplify right side
    90,534.11x = 4,260,052,902.04
  5. Step 5: Solve for x
    x = 4,260,052,902.04/90,534.11
  6. Step 6: Final answer
    x = 47,054.67

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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.