Home / 77,288.20-116,105.10-74,139.40

Finding the Fourth Proportional to 77,288.20, 116,105.10 and 74,139.40

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Solution

The fourth proportional to 77,288.20, 116,105.10 and 74,139.40 is: 111,374.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,288.20 : 116,105.10 = 74,139.40 : x
  2. Step 2: Convert to fraction form
    77,288.20/116,105.10 = 74,139.40/x
  3. Step 3: Cross multiply
    77,288.20x = 116,105.10 × 74,139.40
  4. Step 4: Simplify right side
    77,288.20x = 8,607,962,450.94
  5. Step 5: Solve for x
    x = 8,607,962,450.94/77,288.20
  6. Step 6: Final answer
    x = 111,374.86

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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.