Home / 90,309.14-135,470.21-31,143.96

Finding the Fourth Proportional to 90,309.14, 135,470.21 and 31,143.96

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Solution

The fourth proportional to 90,309.14, 135,470.21 and 31,143.96 is: 46,718.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,309.14 : 135,470.21 = 31,143.96 : x
  2. Step 2: Convert to fraction form
    90,309.14/135,470.21 = 31,143.96/x
  3. Step 3: Cross multiply
    90,309.14x = 135,470.21 × 31,143.96
  4. Step 4: Simplify right side
    90,309.14x = 4,219,078,645.71
  5. Step 5: Solve for x
    x = 4,219,078,645.71/90,309.14
  6. Step 6: Final answer
    x = 46,718.18

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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.