Home / 81,696.24-122,551.90-31,780.12

Finding the Fourth Proportional to 81,696.24, 122,551.90 and 31,780.12

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Solution

The fourth proportional to 81,696.24, 122,551.90 and 31,780.12 is: 47,673.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,696.24 : 122,551.90 = 31,780.12 : x
  2. Step 2: Convert to fraction form
    81,696.24/122,551.90 = 31,780.12/x
  3. Step 3: Cross multiply
    81,696.24x = 122,551.90 × 31,780.12
  4. Step 4: Simplify right side
    81,696.24x = 3,894,714,088.23
  5. Step 5: Solve for x
    x = 3,894,714,088.23/81,696.24
  6. Step 6: Final answer
    x = 47,673.11

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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.