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Finding the Fourth Proportional to 143,456.40, 215,087.40 and 75,999.60

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Solution

The fourth proportional to 143,456.40, 215,087.40 and 75,999.60 is: 113,947.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,456.40 : 215,087.40 = 75,999.60 : x
  2. Step 2: Convert to fraction form
    143,456.40/215,087.40 = 75,999.60/x
  3. Step 3: Cross multiply
    143,456.40x = 215,087.40 × 75,999.60
  4. Step 4: Simplify right side
    143,456.40x = 16,346,556,365.04
  5. Step 5: Solve for x
    x = 16,346,556,365.04/143,456.40
  6. Step 6: Final answer
    x = 113,947.91

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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.