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Finding the Fourth Proportional to 205,766.11, 308,661.21 and 79,407.02

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Solution

The fourth proportional to 205,766.11, 308,661.21 and 79,407.02 is: 119,115.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,766.11 : 308,661.21 = 79,407.02 : x
  2. Step 2: Convert to fraction form
    205,766.11/308,661.21 = 79,407.02/x
  3. Step 3: Cross multiply
    205,766.11x = 308,661.21 × 79,407.02
  4. Step 4: Simplify right side
    205,766.11x = 24,509,866,875.69
  5. Step 5: Solve for x
    x = 24,509,866,875.69/205,766.11
  6. Step 6: Final answer
    x = 119,115.18

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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.