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Finding the Fourth Proportional to 144,038.62, 198,773.31 and 79,507.88

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Solution

The fourth proportional to 144,038.62, 198,773.31 and 79,507.88 is: 109,720.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,038.62 : 198,773.31 = 79,507.88 : x
  2. Step 2: Convert to fraction form
    144,038.62/198,773.31 = 79,507.88/x
  3. Step 3: Cross multiply
    144,038.62x = 198,773.31 × 79,507.88
  4. Step 4: Simplify right side
    144,038.62x = 15,804,044,478.68
  5. Step 5: Solve for x
    x = 15,804,044,478.68/144,038.62
  6. Step 6: Final answer
    x = 109,720.88

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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.