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Finding the Fourth Proportional to 363,958.80, 545,679.72 and 139,129.80

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Solution

The fourth proportional to 363,958.80, 545,679.72 and 139,129.80 is: 208,595.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,958.80 : 545,679.72 = 139,129.80 : x
  2. Step 2: Convert to fraction form
    363,958.80/545,679.72 = 139,129.80/x
  3. Step 3: Cross multiply
    363,958.80x = 545,679.72 × 139,129.80
  4. Step 4: Simplify right side
    363,958.80x = 75,920,310,307.66
  5. Step 5: Solve for x
    x = 75,920,310,307.66/363,958.80
  6. Step 6: Final answer
    x = 208,595.89

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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.