Home / 139,988.03-193,178.67-79,557.62

Finding the Fourth Proportional to 139,988.03, 193,178.67 and 79,557.62

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Solution

The fourth proportional to 139,988.03, 193,178.67 and 79,557.62 is: 109,786.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,988.03 : 193,178.67 = 79,557.62 : x
  2. Step 2: Convert to fraction form
    139,988.03/193,178.67 = 79,557.62/x
  3. Step 3: Cross multiply
    139,988.03x = 193,178.67 × 79,557.62
  4. Step 4: Simplify right side
    139,988.03x = 15,368,835,219.97
  5. Step 5: Solve for x
    x = 15,368,835,219.97/139,988.03
  6. Step 6: Final answer
    x = 109,786.78

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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.