Home / 257,540.05-386,416.36-139,071.88

Finding the Fourth Proportional to 257,540.05, 386,416.36 and 139,071.88

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Solution

The fourth proportional to 257,540.05, 386,416.36 and 139,071.88 is: 208,665.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,540.05 : 386,416.36 = 139,071.88 : x
  2. Step 2: Convert to fraction form
    257,540.05/386,416.36 = 139,071.88/x
  3. Step 3: Cross multiply
    257,540.05x = 386,416.36 × 139,071.88
  4. Step 4: Simplify right side
    257,540.05x = 53,739,649,647.96
  5. Step 5: Solve for x
    x = 53,739,649,647.96/257,540.05
  6. Step 6: Final answer
    x = 208,665.21

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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.