Home / 100,858.20-151,287.30-85,111.80

Finding the Fourth Proportional to 100,858.20, 151,287.30 and 85,111.80

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Solution

The fourth proportional to 100,858.20, 151,287.30 and 85,111.80 is: 127,667.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,858.20 : 151,287.30 = 85,111.80 : x
  2. Step 2: Convert to fraction form
    100,858.20/151,287.30 = 85,111.80/x
  3. Step 3: Cross multiply
    100,858.20x = 151,287.30 × 85,111.80
  4. Step 4: Simplify right side
    100,858.20x = 12,876,334,420.14
  5. Step 5: Solve for x
    x = 12,876,334,420.14/100,858.20
  6. Step 6: Final answer
    x = 127,667.70

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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.