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Finding the Fourth Proportional to 144,009.18, 198,731.16 and 79,479

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Solution

The fourth proportional to 144,009.18, 198,731.16 and 79,479 is: 109,680.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,009.18 : 198,731.16 = 79,479 : x
  2. Step 2: Convert to fraction form
    144,009.18/198,731.16 = 79,479/x
  3. Step 3: Cross multiply
    144,009.18x = 198,731.16 × 79,479
  4. Step 4: Simplify right side
    144,009.18x = 15,794,953,865.64
  5. Step 5: Solve for x
    x = 15,794,953,865.64/144,009.18
  6. Step 6: Final answer
    x = 109,680.19

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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.