Home / 81,607.07-122,379.44-31,680.72

Finding the Fourth Proportional to 81,607.07, 122,379.44 and 31,680.72

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Solution

The fourth proportional to 81,607.07, 122,379.44 and 31,680.72 is: 47,508.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,607.07 : 122,379.44 = 31,680.72 : x
  2. Step 2: Convert to fraction form
    81,607.07/122,379.44 = 31,680.72/x
  3. Step 3: Cross multiply
    81,607.07x = 122,379.44 × 31,680.72
  4. Step 4: Simplify right side
    81,607.07x = 3,877,068,772.40
  5. Step 5: Solve for x
    x = 3,877,068,772.40/81,607.07
  6. Step 6: Final answer
    x = 47,508.98

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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.