Home / 80,954.10-121,431.15-31,706.10

Finding the Fourth Proportional to 80,954.10, 121,431.15 and 31,706.10

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Solution

The fourth proportional to 80,954.10, 121,431.15 and 31,706.10 is: 47,559.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,954.10 : 121,431.15 = 31,706.10 : x
  2. Step 2: Convert to fraction form
    80,954.10/121,431.15 = 31,706.10/x
  3. Step 3: Cross multiply
    80,954.10x = 121,431.15 × 31,706.10
  4. Step 4: Simplify right side
    80,954.10x = 3,850,108,185.02
  5. Step 5: Solve for x
    x = 3,850,108,185.02/80,954.10
  6. Step 6: Final answer
    x = 47,559.15

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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.