Home / 205,639.20-308,228.40-105,760.80

Finding the Fourth Proportional to 205,639.20, 308,228.40 and 105,760.80

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Solution

The fourth proportional to 205,639.20, 308,228.40 and 105,760.80 is: 158,522.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,639.20 : 308,228.40 = 105,760.80 : x
  2. Step 2: Convert to fraction form
    205,639.20/308,228.40 = 105,760.80/x
  3. Step 3: Cross multiply
    205,639.20x = 308,228.40 × 105,760.80
  4. Step 4: Simplify right side
    205,639.20x = 32,598,482,166.72
  5. Step 5: Solve for x
    x = 32,598,482,166.72/205,639.20
  6. Step 6: Final answer
    x = 158,522.70

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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.