Home / 205,570.40-308,125.20-87,221.60

Finding the Fourth Proportional to 205,570.40, 308,125.20 and 87,221.60

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Solution

The fourth proportional to 205,570.40, 308,125.20 and 87,221.60 is: 130,734.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,570.40 : 308,125.20 = 87,221.60 : x
  2. Step 2: Convert to fraction form
    205,570.40/308,125.20 = 87,221.60/x
  3. Step 3: Cross multiply
    205,570.40x = 308,125.20 × 87,221.60
  4. Step 4: Simplify right side
    205,570.40x = 26,875,172,944.32
  5. Step 5: Solve for x
    x = 26,875,172,944.32/205,570.40
  6. Step 6: Final answer
    x = 130,734.64

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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.