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Finding the Fourth Proportional to 79,638.21, 109,900.05 and 45,189.52

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Solution

The fourth proportional to 79,638.21, 109,900.05 and 45,189.52 is: 62,361.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,638.21 : 109,900.05 = 45,189.52 : x
  2. Step 2: Convert to fraction form
    79,638.21/109,900.05 = 45,189.52/x
  3. Step 3: Cross multiply
    79,638.21x = 109,900.05 × 45,189.52
  4. Step 4: Simplify right side
    79,638.21x = 4,966,330,507.48
  5. Step 5: Solve for x
    x = 4,966,330,507.48/79,638.21
  6. Step 6: Final answer
    x = 62,361.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.