Home / 155,845.20-215,014.80-87,853.80

Finding the Fourth Proportional to 155,845.20, 215,014.80 and 87,853.80

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Solution

The fourth proportional to 155,845.20, 215,014.80 and 87,853.80 is: 121,209.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,845.20 : 215,014.80 = 87,853.80 : x
  2. Step 2: Convert to fraction form
    155,845.20/215,014.80 = 87,853.80/x
  3. Step 3: Cross multiply
    155,845.20x = 215,014.80 × 87,853.80
  4. Step 4: Simplify right side
    155,845.20x = 18,889,867,236.24
  5. Step 5: Solve for x
    x = 18,889,867,236.24/155,845.20
  6. Step 6: Final answer
    x = 121,209.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.