Home / 102,085.20-152,836.20-78,562.80

Finding the Fourth Proportional to 102,085.20, 152,836.20 and 78,562.80

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Solution

The fourth proportional to 102,085.20, 152,836.20 and 78,562.80 is: 117,619.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,085.20 : 152,836.20 = 78,562.80 : x
  2. Step 2: Convert to fraction form
    102,085.20/152,836.20 = 78,562.80/x
  3. Step 3: Cross multiply
    102,085.20x = 152,836.20 × 78,562.80
  4. Step 4: Simplify right side
    102,085.20x = 12,007,239,813.36
  5. Step 5: Solve for x
    x = 12,007,239,813.36/102,085.20
  6. Step 6: Final answer
    x = 117,619.79

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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.