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Finding the Fourth Proportional to 72,346.32, 108,518.76 and 19,754.64

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Solution

The fourth proportional to 72,346.32, 108,518.76 and 19,754.64 is: 29,631.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,346.32 : 108,518.76 = 19,754.64 : x
  2. Step 2: Convert to fraction form
    72,346.32/108,518.76 = 19,754.64/x
  3. Step 3: Cross multiply
    72,346.32x = 108,518.76 × 19,754.64
  4. Step 4: Simplify right side
    72,346.32x = 2,143,749,037.05
  5. Step 5: Solve for x
    x = 2,143,749,037.05/72,346.32
  6. Step 6: Final answer
    x = 29,631.76

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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.