Home / 80,868.56-121,302.84-31,586

Finding the Fourth Proportional to 80,868.56, 121,302.84 and 31,586

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Solution

The fourth proportional to 80,868.56, 121,302.84 and 31,586 is: 47,379

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,868.56 : 121,302.84 = 31,586 : x
  2. Step 2: Convert to fraction form
    80,868.56/121,302.84 = 31,586/x
  3. Step 3: Cross multiply
    80,868.56x = 121,302.84 × 31,586
  4. Step 4: Simplify right side
    80,868.56x = 3,831,471,504.24
  5. Step 5: Solve for x
    x = 3,831,471,504.24/80,868.56
  6. Step 6: Final answer
    x = 47,379

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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.