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Finding the Fourth Proportional to 143,901.65, 198,579.37 and 79,373.45

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Solution

The fourth proportional to 143,901.65, 198,579.37 and 79,373.45 is: 109,532.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,901.65 : 198,579.37 = 79,373.45 : x
  2. Step 2: Convert to fraction form
    143,901.65/198,579.37 = 79,373.45/x
  3. Step 3: Cross multiply
    143,901.65x = 198,579.37 × 79,373.45
  4. Step 4: Simplify right side
    143,901.65x = 15,761,928,305.96
  5. Step 5: Solve for x
    x = 15,761,928,305.96/143,901.65
  6. Step 6: Final answer
    x = 109,532.65

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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.