Home / 406,131.85-609,189.60-139,886.47

Finding the Fourth Proportional to 406,131.85, 609,189.60 and 139,886.47

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Solution

The fourth proportional to 406,131.85, 609,189.60 and 139,886.47 is: 209,826.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,131.85 : 609,189.60 = 139,886.47 : x
  2. Step 2: Convert to fraction form
    406,131.85/609,189.60 = 139,886.47/x
  3. Step 3: Cross multiply
    406,131.85x = 609,189.60 × 139,886.47
  4. Step 4: Simplify right side
    406,131.85x = 85,217,382,704.71
  5. Step 5: Solve for x
    x = 85,217,382,704.71/406,131.85
  6. Step 6: Final answer
    x = 209,826.89

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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.