Home / 90,764.20-136,146.84-31,558.42

Finding the Fourth Proportional to 90,764.20, 136,146.84 and 31,558.42

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Solution

The fourth proportional to 90,764.20, 136,146.84 and 31,558.42 is: 47,337.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,764.20 : 136,146.84 = 31,558.42 : x
  2. Step 2: Convert to fraction form
    90,764.20/136,146.84 = 31,558.42/x
  3. Step 3: Cross multiply
    90,764.20x = 136,146.84 × 31,558.42
  4. Step 4: Simplify right side
    90,764.20x = 4,296,579,158.39
  5. Step 5: Solve for x
    x = 4,296,579,158.39/90,764.20
  6. Step 6: Final answer
    x = 47,337.82

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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.