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Finding the Fourth Proportional to 205,509.70, 308,034.15 and 105,631.30

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Solution

The fourth proportional to 205,509.70, 308,034.15 and 105,631.30 is: 158,328.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,509.70 : 308,034.15 = 105,631.30 : x
  2. Step 2: Convert to fraction form
    205,509.70/308,034.15 = 105,631.30/x
  3. Step 3: Cross multiply
    205,509.70x = 308,034.15 × 105,631.30
  4. Step 4: Simplify right side
    205,509.70x = 32,538,047,708.90
  5. Step 5: Solve for x
    x = 32,538,047,708.90/205,509.70
  6. Step 6: Final answer
    x = 158,328.53

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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.