Home / 70,823.87-106,211.05-20,890.71

Finding the Fourth Proportional to 70,823.87, 106,211.05 and 20,890.71

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Solution

The fourth proportional to 70,823.87, 106,211.05 and 20,890.71 is: 31,328.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,823.87 : 106,211.05 = 20,890.71 : x
  2. Step 2: Convert to fraction form
    70,823.87/106,211.05 = 20,890.71/x
  3. Step 3: Cross multiply
    70,823.87x = 106,211.05 × 20,890.71
  4. Step 4: Simplify right side
    70,823.87x = 2,218,824,192.12
  5. Step 5: Solve for x
    x = 2,218,824,192.12/70,823.87
  6. Step 6: Final answer
    x = 31,328.76

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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.