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Finding the Fourth Proportional to 119,319.20, 178,978.08 and 30,572.72

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Solution

The fourth proportional to 119,319.20, 178,978.08 and 30,572.72 is: 45,858.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,319.20 : 178,978.08 = 30,572.72 : x
  2. Step 2: Convert to fraction form
    119,319.20/178,978.08 = 30,572.72/x
  3. Step 3: Cross multiply
    119,319.20x = 178,978.08 × 30,572.72
  4. Step 4: Simplify right side
    119,319.20x = 5,471,846,725.98
  5. Step 5: Solve for x
    x = 5,471,846,725.98/119,319.20
  6. Step 6: Final answer
    x = 45,858.90

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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.