Home / 105,418.20-158,127.30-69,988.80

Finding the Fourth Proportional to 105,418.20, 158,127.30 and 69,988.80

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Solution

The fourth proportional to 105,418.20, 158,127.30 and 69,988.80 is: 104,983.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,418.20 : 158,127.30 = 69,988.80 : x
  2. Step 2: Convert to fraction form
    105,418.20/158,127.30 = 69,988.80/x
  3. Step 3: Cross multiply
    105,418.20x = 158,127.30 × 69,988.80
  4. Step 4: Simplify right side
    105,418.20x = 11,067,139,974.24
  5. Step 5: Solve for x
    x = 11,067,139,974.24/105,418.20
  6. Step 6: Final answer
    x = 104,983.20

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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.