Home / 90,559.35-135,808.23-31,381.20

Finding the Fourth Proportional to 90,559.35, 135,808.23 and 31,381.20

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Solution

The fourth proportional to 90,559.35, 135,808.23 and 31,381.20 is: 47,061.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,559.35 : 135,808.23 = 31,381.20 : x
  2. Step 2: Convert to fraction form
    90,559.35/135,808.23 = 31,381.20/x
  3. Step 3: Cross multiply
    90,559.35x = 135,808.23 × 31,381.20
  4. Step 4: Simplify right side
    90,559.35x = 4,261,825,227.28
  5. Step 5: Solve for x
    x = 4,261,825,227.28/90,559.35
  6. Step 6: Final answer
    x = 47,061.13

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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.