Home / 78,789.28-118,084.08-77,956

Finding the Fourth Proportional to 78,789.28, 118,084.08 and 77,956

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Solution

The fourth proportional to 78,789.28, 118,084.08 and 77,956 is: 116,835.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,789.28 : 118,084.08 = 77,956 : x
  2. Step 2: Convert to fraction form
    78,789.28/118,084.08 = 77,956/x
  3. Step 3: Cross multiply
    78,789.28x = 118,084.08 × 77,956
  4. Step 4: Simplify right side
    78,789.28x = 9,205,362,540.48
  5. Step 5: Solve for x
    x = 9,205,362,540.48/78,789.28
  6. Step 6: Final answer
    x = 116,835.22

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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.