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Finding the Fourth Proportional to 363,813.32, 545,720.02 and 139,242.65

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Solution

The fourth proportional to 363,813.32, 545,720.02 and 139,242.65 is: 208,863.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,813.32 : 545,720.02 = 139,242.65 : x
  2. Step 2: Convert to fraction form
    363,813.32/545,720.02 = 139,242.65/x
  3. Step 3: Cross multiply
    363,813.32x = 545,720.02 × 139,242.65
  4. Step 4: Simplify right side
    363,813.32x = 75,987,498,666.15
  5. Step 5: Solve for x
    x = 75,987,498,666.15/363,813.32
  6. Step 6: Final answer
    x = 208,863.98

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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.