Home / 205,538.40-308,077.20-87,189.60

Finding the Fourth Proportional to 205,538.40, 308,077.20 and 87,189.60

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Solution

The fourth proportional to 205,538.40, 308,077.20 and 87,189.60 is: 130,686.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,538.40 : 308,077.20 = 87,189.60 : x
  2. Step 2: Convert to fraction form
    205,538.40/308,077.20 = 87,189.60/x
  3. Step 3: Cross multiply
    205,538.40x = 308,077.20 × 87,189.60
  4. Step 4: Simplify right side
    205,538.40x = 26,861,127,837.12
  5. Step 5: Solve for x
    x = 26,861,127,837.12/205,538.40
  6. Step 6: Final answer
    x = 130,686.66

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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.