Home / 51,578.97-71,178.10-28,918.81

Finding the Fourth Proportional to 51,578.97, 71,178.10 and 28,918.81

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Solution

The fourth proportional to 51,578.97, 71,178.10 and 28,918.81 is: 39,907.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,578.97 : 71,178.10 = 28,918.81 : x
  2. Step 2: Convert to fraction form
    51,578.97/71,178.10 = 28,918.81/x
  3. Step 3: Cross multiply
    51,578.97x = 71,178.10 × 28,918.81
  4. Step 4: Simplify right side
    51,578.97x = 2,058,385,950.06
  5. Step 5: Solve for x
    x = 2,058,385,950.06/51,578.97
  6. Step 6: Final answer
    x = 39,907.47

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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.