Home / 205,610.40-308,415.60-105,631.20

Finding the Fourth Proportional to 205,610.40, 308,415.60 and 105,631.20

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Solution

The fourth proportional to 205,610.40, 308,415.60 and 105,631.20 is: 158,446.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,610.40 : 308,415.60 = 105,631.20 : x
  2. Step 2: Convert to fraction form
    205,610.40/308,415.60 = 105,631.20/x
  3. Step 3: Cross multiply
    205,610.40x = 308,415.60 × 105,631.20
  4. Step 4: Simplify right side
    205,610.40x = 32,578,309,926.72
  5. Step 5: Solve for x
    x = 32,578,309,926.72/205,610.40
  6. Step 6: Final answer
    x = 158,446.80

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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.