Home / 77,784.20-116,817.10-68,107.40

Finding the Fourth Proportional to 77,784.20, 116,817.10 and 68,107.40

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Solution

The fourth proportional to 77,784.20, 116,817.10 and 68,107.40 is: 102,284.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,784.20 : 116,817.10 = 68,107.40 : x
  2. Step 2: Convert to fraction form
    77,784.20/116,817.10 = 68,107.40/x
  3. Step 3: Cross multiply
    77,784.20x = 116,817.10 × 68,107.40
  4. Step 4: Simplify right side
    77,784.20x = 7,956,108,956.54
  5. Step 5: Solve for x
    x = 7,956,108,956.54/77,784.20
  6. Step 6: Final answer
    x = 102,284.38

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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.