Home / 90,590.40-135,837-31,408.56

Finding the Fourth Proportional to 90,590.40, 135,837 and 31,408.56

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Solution

The fourth proportional to 90,590.40, 135,837 and 31,408.56 is: 47,095.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,590.40 : 135,837 = 31,408.56 : x
  2. Step 2: Convert to fraction form
    90,590.40/135,837 = 31,408.56/x
  3. Step 3: Cross multiply
    90,590.40x = 135,837 × 31,408.56
  4. Step 4: Simplify right side
    90,590.40x = 4,266,444,564.72
  5. Step 5: Solve for x
    x = 4,266,444,564.72/90,590.40
  6. Step 6: Final answer
    x = 47,095.99

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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.