Home / 115,157.28-172,722.16-40,271.68

Finding the Fourth Proportional to 115,157.28, 172,722.16 and 40,271.68

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Solution

The fourth proportional to 115,157.28, 172,722.16 and 40,271.68 is: 60,402.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,157.28 : 172,722.16 = 40,271.68 : x
  2. Step 2: Convert to fraction form
    115,157.28/172,722.16 = 40,271.68/x
  3. Step 3: Cross multiply
    115,157.28x = 172,722.16 × 40,271.68
  4. Step 4: Simplify right side
    115,157.28x = 6,955,811,556.43
  5. Step 5: Solve for x
    x = 6,955,811,556.43/115,157.28
  6. Step 6: Final answer
    x = 60,402.71

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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.