Home / 78,928.46-118,379.90-28,996.28

Finding the Fourth Proportional to 78,928.46, 118,379.90 and 28,996.28

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Solution

The fourth proportional to 78,928.46, 118,379.90 and 28,996.28 is: 43,489.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,928.46 : 118,379.90 = 28,996.28 : x
  2. Step 2: Convert to fraction form
    78,928.46/118,379.90 = 28,996.28/x
  3. Step 3: Cross multiply
    78,928.46x = 118,379.90 × 28,996.28
  4. Step 4: Simplify right side
    78,928.46x = 3,432,576,726.77
  5. Step 5: Solve for x
    x = 3,432,576,726.77/78,928.46
  6. Step 6: Final answer
    x = 43,489.72

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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.