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Finding the Fourth Proportional to 205,339.60, 308,124.60 and 86,990.80

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Solution

The fourth proportional to 205,339.60, 308,124.60 and 86,990.80 is: 130,535.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,339.60 : 308,124.60 = 86,990.80 : x
  2. Step 2: Convert to fraction form
    205,339.60/308,124.60 = 86,990.80/x
  3. Step 3: Cross multiply
    205,339.60x = 308,124.60 × 86,990.80
  4. Step 4: Simplify right side
    205,339.60x = 26,804,005,453.68
  5. Step 5: Solve for x
    x = 26,804,005,453.68/205,339.60
  6. Step 6: Final answer
    x = 130,535.00

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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.