Home / 288,109.22-431,949.69-138,206.75

Finding the Fourth Proportional to 288,109.22, 431,949.69 and 138,206.75

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Solution

The fourth proportional to 288,109.22, 431,949.69 and 138,206.75 is: 207,207.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,109.22 : 431,949.69 = 138,206.75 : x
  2. Step 2: Convert to fraction form
    288,109.22/431,949.69 = 138,206.75/x
  3. Step 3: Cross multiply
    288,109.22x = 431,949.69 × 138,206.75
  4. Step 4: Simplify right side
    288,109.22x = 59,698,360,658.66
  5. Step 5: Solve for x
    x = 59,698,360,658.66/288,109.22
  6. Step 6: Final answer
    x = 207,207.40

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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.