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Finding the Fourth Proportional to 205,479.20, 308,218.80 and 57,735.20

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Solution

The fourth proportional to 205,479.20, 308,218.80 and 57,735.20 is: 86,602.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,479.20 : 308,218.80 = 57,735.20 : x
  2. Step 2: Convert to fraction form
    205,479.20/308,218.80 = 57,735.20/x
  3. Step 3: Cross multiply
    205,479.20x = 308,218.80 × 57,735.20
  4. Step 4: Simplify right side
    205,479.20x = 17,795,074,061.76
  5. Step 5: Solve for x
    x = 17,795,074,061.76/205,479.20
  6. Step 6: Final answer
    x = 86,602.80

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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.