Home / 253,905.60-380,858.40-66,917.10

Finding the Fourth Proportional to 253,905.60, 380,858.40 and 66,917.10

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Solution

The fourth proportional to 253,905.60, 380,858.40 and 66,917.10 is: 100,375.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,905.60 : 380,858.40 = 66,917.10 : x
  2. Step 2: Convert to fraction form
    253,905.60/380,858.40 = 66,917.10/x
  3. Step 3: Cross multiply
    253,905.60x = 380,858.40 × 66,917.10
  4. Step 4: Simplify right side
    253,905.60x = 25,485,939,638.64
  5. Step 5: Solve for x
    x = 25,485,939,638.64/253,905.60
  6. Step 6: Final answer
    x = 100,375.65

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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.