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Finding the Fourth Proportional to 318,855.83, 478,308.44 and 129,225.92

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Solution

The fourth proportional to 318,855.83, 478,308.44 and 129,225.92 is: 193,848.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,855.83 : 478,308.44 = 129,225.92 : x
  2. Step 2: Convert to fraction form
    318,855.83/478,308.44 = 129,225.92/x
  3. Step 3: Cross multiply
    318,855.83x = 478,308.44 × 129,225.92
  4. Step 4: Simplify right side
    318,855.83x = 61,809,846,134.29
  5. Step 5: Solve for x
    x = 61,809,846,134.29/318,855.83
  6. Step 6: Final answer
    x = 193,848.88

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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.