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Finding the Fourth Proportional to 143,902.65, 198,580.74 and 79,374.45

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Solution

The fourth proportional to 143,902.65, 198,580.74 and 79,374.45 is: 109,534.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,902.65 : 198,580.74 = 79,374.45 : x
  2. Step 2: Convert to fraction form
    143,902.65/198,580.74 = 79,374.45/x
  3. Step 3: Cross multiply
    143,902.65x = 198,580.74 × 79,374.45
  4. Step 4: Simplify right side
    143,902.65x = 15,762,237,018.09
  5. Step 5: Solve for x
    x = 15,762,237,018.09/143,902.65
  6. Step 6: Final answer
    x = 109,534.03

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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.