Home / 205,507.20-308,030.40-105,628.80

Finding the Fourth Proportional to 205,507.20, 308,030.40 and 105,628.80

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Solution

The fourth proportional to 205,507.20, 308,030.40 and 105,628.80 is: 158,324.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,507.20 : 308,030.40 = 105,628.80 : x
  2. Step 2: Convert to fraction form
    205,507.20/308,030.40 = 105,628.80/x
  3. Step 3: Cross multiply
    205,507.20x = 308,030.40 × 105,628.80
  4. Step 4: Simplify right side
    205,507.20x = 32,536,881,515.52
  5. Step 5: Solve for x
    x = 32,536,881,515.52/205,507.20
  6. Step 6: Final answer
    x = 158,324.78

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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.