Home / 205,869.90-308,833.65-87,540.30

Finding the Fourth Proportional to 205,869.90, 308,833.65 and 87,540.30

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Solution

The fourth proportional to 205,869.90, 308,833.65 and 87,540.30 is: 131,322.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,869.90 : 308,833.65 = 87,540.30 : x
  2. Step 2: Convert to fraction form
    205,869.90/308,833.65 = 87,540.30/x
  3. Step 3: Cross multiply
    205,869.90x = 308,833.65 × 87,540.30
  4. Step 4: Simplify right side
    205,869.90x = 27,035,390,371.10
  5. Step 5: Solve for x
    x = 27,035,390,371.10/205,869.90
  6. Step 6: Final answer
    x = 131,322.70

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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.