Home / 80,938.66-121,409.10-31,021.30

Finding the Fourth Proportional to 80,938.66, 121,409.10 and 31,021.30

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Solution

The fourth proportional to 80,938.66, 121,409.10 and 31,021.30 is: 46,532.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,938.66 : 121,409.10 = 31,021.30 : x
  2. Step 2: Convert to fraction form
    80,938.66/121,409.10 = 31,021.30/x
  3. Step 3: Cross multiply
    80,938.66x = 121,409.10 × 31,021.30
  4. Step 4: Simplify right side
    80,938.66x = 3,766,268,113.83
  5. Step 5: Solve for x
    x = 3,766,268,113.83/80,938.66
  6. Step 6: Final answer
    x = 46,532.38

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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.