Home / 257,539.17-386,415.05-139,071

Finding the Fourth Proportional to 257,539.17, 386,415.05 and 139,071

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Solution

The fourth proportional to 257,539.17, 386,415.05 and 139,071 is: 208,663.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,539.17 : 386,415.05 = 139,071 : x
  2. Step 2: Convert to fraction form
    257,539.17/386,415.05 = 139,071/x
  3. Step 3: Cross multiply
    257,539.17x = 386,415.05 × 139,071
  4. Step 4: Simplify right side
    257,539.17x = 53,739,126,723.20
  5. Step 5: Solve for x
    x = 53,739,126,723.20/257,539.17
  6. Step 6: Final answer
    x = 208,663.90

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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.