Home / 71,645.18-107,438.27-31,121.28

Finding the Fourth Proportional to 71,645.18, 107,438.27 and 31,121.28

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Solution

The fourth proportional to 71,645.18, 107,438.27 and 31,121.28 is: 46,669.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,645.18 : 107,438.27 = 31,121.28 : x
  2. Step 2: Convert to fraction form
    71,645.18/107,438.27 = 31,121.28/x
  3. Step 3: Cross multiply
    71,645.18x = 107,438.27 × 31,121.28
  4. Step 4: Simplify right side
    71,645.18x = 3,343,616,327.78
  5. Step 5: Solve for x
    x = 3,343,616,327.78/71,645.18
  6. Step 6: Final answer
    x = 46,669.11

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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.