Home / 78,539.19-108,380.92-42,729.34

Finding the Fourth Proportional to 78,539.19, 108,380.92 and 42,729.34

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Solution

The fourth proportional to 78,539.19, 108,380.92 and 42,729.34 is: 58,964.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,539.19 : 108,380.92 = 42,729.34 : x
  2. Step 2: Convert to fraction form
    78,539.19/108,380.92 = 42,729.34/x
  3. Step 3: Cross multiply
    78,539.19x = 108,380.92 × 42,729.34
  4. Step 4: Simplify right side
    78,539.19x = 4,631,045,180.19
  5. Step 5: Solve for x
    x = 4,631,045,180.19/78,539.19
  6. Step 6: Final answer
    x = 58,964.77

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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.