Home / 90,542.45-135,837.83-31,378.07

Finding the Fourth Proportional to 90,542.45, 135,837.83 and 31,378.07

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Solution

The fourth proportional to 90,542.45, 135,837.83 and 31,378.07 is: 47,075.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,542.45 : 135,837.83 = 31,378.07 : x
  2. Step 2: Convert to fraction form
    90,542.45/135,837.83 = 31,378.07/x
  3. Step 3: Cross multiply
    90,542.45x = 135,837.83 × 31,378.07
  4. Step 4: Simplify right side
    90,542.45x = 4,262,329,356.43
  5. Step 5: Solve for x
    x = 4,262,329,356.43/90,542.45
  6. Step 6: Final answer
    x = 47,075.48

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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.