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Finding the Fourth Proportional to 363,669.60, 545,245.20 and 138,943.20

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Solution

The fourth proportional to 363,669.60, 545,245.20 and 138,943.20 is: 208,315.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,669.60 : 545,245.20 = 138,943.20 : x
  2. Step 2: Convert to fraction form
    363,669.60/545,245.20 = 138,943.20/x
  3. Step 3: Cross multiply
    363,669.60x = 545,245.20 × 138,943.20
  4. Step 4: Simplify right side
    363,669.60x = 75,758,112,872.64
  5. Step 5: Solve for x
    x = 75,758,112,872.64/363,669.60
  6. Step 6: Final answer
    x = 208,315.77

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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.