Home / 90,872.08-136,298.39-31,708.87

Finding the Fourth Proportional to 90,872.08, 136,298.39 and 31,708.87

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Solution

The fourth proportional to 90,872.08, 136,298.39 and 31,708.87 is: 47,559.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,872.08 : 136,298.39 = 31,708.87 : x
  2. Step 2: Convert to fraction form
    90,872.08/136,298.39 = 31,708.87/x
  3. Step 3: Cross multiply
    90,872.08x = 136,298.39 × 31,708.87
  4. Step 4: Simplify right side
    90,872.08x = 4,321,867,929.72
  5. Step 5: Solve for x
    x = 4,321,867,929.72/90,872.08
  6. Step 6: Final answer
    x = 47,559.91

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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.