Home / 103,981.80-143,456.40-68,191.68

Finding the Fourth Proportional to 103,981.80, 143,456.40 and 68,191.68

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Solution

The fourth proportional to 103,981.80, 143,456.40 and 68,191.68 is: 94,079.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,981.80 : 143,456.40 = 68,191.68 : x
  2. Step 2: Convert to fraction form
    103,981.80/143,456.40 = 68,191.68/x
  3. Step 3: Cross multiply
    103,981.80x = 143,456.40 × 68,191.68
  4. Step 4: Simplify right side
    103,981.80x = 9,782,532,922.75
  5. Step 5: Solve for x
    x = 9,782,532,922.75/103,981.80
  6. Step 6: Final answer
    x = 94,079.28

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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.