Home / 257,703.21-386,139.29-139,430.25

Finding the Fourth Proportional to 257,703.21, 386,139.29 and 139,430.25

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Solution

The fourth proportional to 257,703.21, 386,139.29 and 139,430.25 is: 208,920.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,703.21 : 386,139.29 = 139,430.25 : x
  2. Step 2: Convert to fraction form
    257,703.21/386,139.29 = 139,430.25/x
  3. Step 3: Cross multiply
    257,703.21x = 386,139.29 × 139,430.25
  4. Step 4: Simplify right side
    257,703.21x = 53,839,497,042.37
  5. Step 5: Solve for x
    x = 53,839,497,042.37/257,703.21
  6. Step 6: Final answer
    x = 208,920.55

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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.