Home / 205,845.60-308,768.40-87,520.80

Finding the Fourth Proportional to 205,845.60, 308,768.40 and 87,520.80

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Solution

The fourth proportional to 205,845.60, 308,768.40 and 87,520.80 is: 131,281.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,845.60 : 308,768.40 = 87,520.80 : x
  2. Step 2: Convert to fraction form
    205,845.60/308,768.40 = 87,520.80/x
  3. Step 3: Cross multiply
    205,845.60x = 308,768.40 × 87,520.80
  4. Step 4: Simplify right side
    205,845.60x = 27,023,657,382.72
  5. Step 5: Solve for x
    x = 27,023,657,382.72/205,845.60
  6. Step 6: Final answer
    x = 131,281.20

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1.5x scale

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.