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Finding the Fourth Proportional to 363,872.79, 545,978.68 and 139,159.22

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Solution

The fourth proportional to 363,872.79, 545,978.68 and 139,159.22 is: 208,803.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,872.79 : 545,978.68 = 139,159.22 : x
  2. Step 2: Convert to fraction form
    363,872.79/545,978.68 = 139,159.22/x
  3. Step 3: Cross multiply
    363,872.79x = 545,978.68 × 139,159.22
  4. Step 4: Simplify right side
    363,872.79x = 75,977,964,167.64
  5. Step 5: Solve for x
    x = 75,977,964,167.64/363,872.79
  6. Step 6: Final answer
    x = 208,803.64

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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.