Home / 90,518.82-135,779.76-31,356.24

Finding the Fourth Proportional to 90,518.82, 135,779.76 and 31,356.24

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Solution

The fourth proportional to 90,518.82, 135,779.76 and 31,356.24 is: 47,034.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,518.82 : 135,779.76 = 31,356.24 : x
  2. Step 2: Convert to fraction form
    90,518.82/135,779.76 = 31,356.24/x
  3. Step 3: Cross multiply
    90,518.82x = 135,779.76 × 31,356.24
  4. Step 4: Simplify right side
    90,518.82x = 4,257,542,741.70
  5. Step 5: Solve for x
    x = 4,257,542,741.70/90,518.82
  6. Step 6: Final answer
    x = 47,034.89

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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.