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Finding the Fourth Proportional to 72,338.76, 108,507.96 and 19,748.16

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Solution

The fourth proportional to 72,338.76, 108,507.96 and 19,748.16 is: 29,622.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,338.76 : 108,507.96 = 19,748.16 : x
  2. Step 2: Convert to fraction form
    72,338.76/108,507.96 = 19,748.16/x
  3. Step 3: Cross multiply
    72,338.76x = 108,507.96 × 19,748.16
  4. Step 4: Simplify right side
    72,338.76x = 2,142,832,555.35
  5. Step 5: Solve for x
    x = 2,142,832,555.35/72,338.76
  6. Step 6: Final answer
    x = 29,622.19

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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.