Home / 90,449.28-135,706.32-31,290.84

Finding the Fourth Proportional to 90,449.28, 135,706.32 and 31,290.84

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Solution

The fourth proportional to 90,449.28, 135,706.32 and 31,290.84 is: 46,947.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,449.28 : 135,706.32 = 31,290.84 : x
  2. Step 2: Convert to fraction form
    90,449.28/135,706.32 = 31,290.84/x
  3. Step 3: Cross multiply
    90,449.28x = 135,706.32 × 31,290.84
  4. Step 4: Simplify right side
    90,449.28x = 4,246,364,746.11
  5. Step 5: Solve for x
    x = 4,246,364,746.11/90,449.28
  6. Step 6: Final answer
    x = 46,947.47

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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.