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Finding the Fourth Proportional to 252,155.72, 378,234.80 and 74,666.08

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Solution

The fourth proportional to 252,155.72, 378,234.80 and 74,666.08 is: 111,999.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,155.72 : 378,234.80 = 74,666.08 : x
  2. Step 2: Convert to fraction form
    252,155.72/378,234.80 = 74,666.08/x
  3. Step 3: Cross multiply
    252,155.72x = 378,234.80 × 74,666.08
  4. Step 4: Simplify right side
    252,155.72x = 28,241,309,835.58
  5. Step 5: Solve for x
    x = 28,241,309,835.58/252,155.72
  6. Step 6: Final answer
    x = 111,999.48

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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.