Home / 205,497.09-308,122.61-85,409.24

Finding the Fourth Proportional to 205,497.09, 308,122.61 and 85,409.24

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Solution

The fourth proportional to 205,497.09, 308,122.61 and 85,409.24 is: 128,062.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,497.09 : 308,122.61 = 85,409.24 : x
  2. Step 2: Convert to fraction form
    205,497.09/308,122.61 = 85,409.24/x
  3. Step 3: Cross multiply
    205,497.09x = 308,122.61 × 85,409.24
  4. Step 4: Simplify right side
    205,497.09x = 26,316,515,979.26
  5. Step 5: Solve for x
    x = 26,316,515,979.26/205,497.09
  6. Step 6: Final answer
    x = 128,062.72

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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.