Home / 78,051.57-117,082.80-31,304.43

Finding the Fourth Proportional to 78,051.57, 117,082.80 and 31,304.43

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Solution

The fourth proportional to 78,051.57, 117,082.80 and 31,304.43 is: 46,958.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,051.57 : 117,082.80 = 31,304.43 : x
  2. Step 2: Convert to fraction form
    78,051.57/117,082.80 = 31,304.43/x
  3. Step 3: Cross multiply
    78,051.57x = 117,082.80 × 31,304.43
  4. Step 4: Simplify right side
    78,051.57x = 3,665,210,316.80
  5. Step 5: Solve for x
    x = 3,665,210,316.80/78,051.57
  6. Step 6: Final answer
    x = 46,958.83

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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.