Home / 72,564.72-100,134.36-40,729.20

Finding the Fourth Proportional to 72,564.72, 100,134.36 and 40,729.20

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Solution

The fourth proportional to 72,564.72, 100,134.36 and 40,729.20 is: 56,203.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,564.72 : 100,134.36 = 40,729.20 : x
  2. Step 2: Convert to fraction form
    72,564.72/100,134.36 = 40,729.20/x
  3. Step 3: Cross multiply
    72,564.72x = 100,134.36 × 40,729.20
  4. Step 4: Simplify right side
    72,564.72x = 4,078,392,375.31
  5. Step 5: Solve for x
    x = 4,078,392,375.31/72,564.72
  6. Step 6: Final answer
    x = 56,203.52

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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.