Home / 90,651.32-135,930.29-40,688.58

Finding the Fourth Proportional to 90,651.32, 135,930.29 and 40,688.58

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Solution

The fourth proportional to 90,651.32, 135,930.29 and 40,688.58 is: 61,011.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,651.32 : 135,930.29 = 40,688.58 : x
  2. Step 2: Convert to fraction form
    90,651.32/135,930.29 = 40,688.58/x
  3. Step 3: Cross multiply
    90,651.32x = 135,930.29 × 40,688.58
  4. Step 4: Simplify right side
    90,651.32x = 5,530,810,275.65
  5. Step 5: Solve for x
    x = 5,530,810,275.65/90,651.32
  6. Step 6: Final answer
    x = 61,011.91

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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.