Home / 51,311.89-70,790.92-31,161.16

Finding the Fourth Proportional to 51,311.89, 70,790.92 and 31,161.16

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Solution

The fourth proportional to 51,311.89, 70,790.92 and 31,161.16 is: 42,990.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,311.89 : 70,790.92 = 31,161.16 : x
  2. Step 2: Convert to fraction form
    51,311.89/70,790.92 = 31,161.16/x
  3. Step 3: Cross multiply
    51,311.89x = 70,790.92 × 31,161.16
  4. Step 4: Simplify right side
    51,311.89x = 2,205,927,184.67
  5. Step 5: Solve for x
    x = 2,205,927,184.67/51,311.89
  6. Step 6: Final answer
    x = 42,990.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.